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Picking a Power Station for a MacBook Pro (And More)

The curse of the modern world is that we’re constantly condemned to think about batteries. Why is my iPhone running low on power so early in the day? Why didn’t my Apple Watch charge last night? Will there be a power outlet on the airplane for my MacBook Air? And for an ever-increasing number of us, does my electric car have enough range for that road trip? Despite this mental churning, it’s still possible to be surprised by a drained device at an inopportune time, as I recently discovered. But with a little forethought and the appropriate backup gear, such situations can be avoided.

Track Meets Need Power

One of my hobbies in the running world is directing track meets for the Finger Lakes Runners Club. That requires running a crufty Windows app called HyTek Meet Manager, something I’ve long done in virtualization using Parallels Desktop or VMware Fusion running on Tonya’s 2016 MacBook Pro. Ignoring the annoyance of having to use Windows and Meet Manager, the approach has worked well for years.

(My setup is actually even more wonderfully arcane. For timing, we use a Time Machine, a race timing device created decades ago that combines a highly accurate timer with a small LCD screen, thermal printer, and keypad—that’s what we’re all staring at below. It supports both wired and wireless thumb switches for recording runners’ times, can start a large display Raceclock automatically—the thing behind my head—and most importantly, can send results to Meet Manager. That connection starts as RS-232 serial at the Time Machine, is converted to USB with a Keyspan RS-232 to USB adapter, and then uses a USB-A to USB-C adapter to plug into the Mac, where the virtualization environment connects it to Windows. In Meet Manager, once I plug everything in, I have to tell it that the track button interface is using serial port 3. Then we print results using a Canon Pixma iP110 mobile printer. I remain amazed that it works at all.)

Track meet gear and volunteers

All the hardware we use, including the MacBook Pro, Time Machine, Raceclock, and Canon Pixma printer, is battery-powered, which is essential for outdoor track meets because many tracks don’t have power available where we set up on the infield near the finish line. I’m obsessive about ensuring that everything is charged before the meet because if something runs out of power, we have to scramble. Realistically, we have sufficient backup systems and experience that we can recover from the loss of any device, but it’s not ideal.

So you can imagine my distress two weeks ago when, midway into the 800-meter race that was the second event of the five-event meet, my results clerk told me that the MacBook Pro had just warned that it was low on power and would be shutting down shortly if we didn’t plug in it. We had been using it for maybe 90 minutes to deal with late registrations and heat changes, but that was nothing new—I’ve been relying on this MacBook Pro for years. I knew it was charged to 100% before I left the house, but I hadn’t internalized just how old it was. It worked fine at last year’s track meets, but they were both really short due to the pandemic and bad weather keeping people away, and as I suddenly realized, its battery was yet another year older and weaker in amps. (A strained analogy, I’m sure, but I couldn’t resist the reference to the tune of Merle Travis’s “Sixteen Tons.”)

There was nothing to do but close the MacBook Pro’s lid and carry on, knowing that we wouldn’t be able to bring results in from the Time Machine or print results sheets for runners. There was no way to get my car onto the track, and although there was power in a press box at the track, I hadn’t even brought the MacBook Pro’s USB-C charger because I knew that we couldn’t run the system from that location. But as I said, we know what we’re doing, so we continued the meet without pausing, assuming that we could either bring the results in from the Time Machine the next day or type them in from the thermal printouts that each race generated. And that proved to be true—all’s well that ends well.

More Power, Scotty!

Nevertheless, the experience troubled me. The MacBook Pro clearly wasn’t going to survive an outdoor track meet again, so I needed to come up with a solution before the next meet later this month. Possibilities included:

  • Install a new battery: For $199, Apple would install a new battery in an out-of-warranty MacBook Pro. But is it worth spending that much on a six-year-old laptop? A battery replacement kit from iFixit is only $139.99, but the installation instructions are rated difficult and require 88 disassembly steps.
  • Move to a new Mac: I could run Meet Manager in Windows for ARM under Parallels Desktop on my 2020 M1 MacBook Air, which has much better battery life. I haven’t experimented with this option because I have trouble believing that Windows for ARM will support old Windows software like Meet Manager, the Keyspan RS-232 to USB adapter, and the Canon Pixma iP110 printer driver. I’ll eventually need to explore it, given that Intel-based Macs are going the way of the dodo bird, but spending time in Windows makes me short-tempered.
  • Acquire a PC laptop: FLRC could get a new PC laptop that would presumably work with our system, but it feels like overkill for just six uses per year. While I suspect someone in the club would be happy to donate an old PC laptop, then we’re back to worrying about battery life.
  • Get a power bank: Numerous manufacturers make USB-C battery packs to charge laptops and other USB devices. While this option seems attractive at first blush, many of the recommendations I found in roundup articles are no longer available, and when they are available (such as these products from Anker), their prices range from about $100 to $200. Not terrible, but not cheap either, and a power bank seems like a too-specific solution to a general problem of battery-powered devices potentially failing.

None of these seemed like a sufficient win, but then a friend turned me on to yet another category of battery—the “power station” that’s meant as a replacement for a gas-powered generator. On the high end, these things can weigh 50 pounds or more, cost several thousand dollars, and power appliances like hot plates and air conditioners. But on the low end, they get more interesting for my purposes.

The big name in the field appears to be Jackery, and its Explorer 160 costs only $139.99 for 167 watt-hours of energy storage with an AC outlet, USB-C port, two USB-A ports, and a DC 12V port. It’s reasonably light at 3.97 pounds (1.8 kg), which is important given the amount of gear I have to pack. The only downside is that its USB-C port puts out just 15 watts, not enough to charge the MacBook Pro while in use. I could plug the MacBook Pro into the AC outlet, but that seems limiting when there’s a USB-C port. The Explorer 300 puts out 60 watts over USB-C, but its 293 watt-hour capacity jacks its weight up to 7.1 pounds (3.22 kg) and price to $299.99.

That got me thinking that a manufacturer more attuned to the digital device market might be more appropriate. Indeed, the $249.99 Anker 521 PowerHouse offers 256 watt-hours, longer lifespan LiFePO4 batteries, two AC outlets, a 60-watt USB-C port, two USB-A ports, and a car outlet. But it’s a hefty 8.2 pounds (3.72 kg). However, the $199.99 Anker 511 PowerHouse weighs only 1.9 pounds (0.86 kg) for a 97-watt-hour power station with an AC outlet, 45-watt USB-C port, and two 15-watt USB-A ports. For $50 more, the $249 Omnicharge Omni 20+ offers an AC outlet, 60-watt USB-C port, two 18-watt USB-A ports, and 10-watt Qi wireless charging. Because it has only a 70-watt-hour battery, it weighs just 1.4 pounds (0.64 kg). Tempting, if pricey.

I couldn’t resist delving into the rathole of random-brand Chinese manufacturers on Amazon, where I first found the $138 ALLPOWERS Portable Charger, which offers two AC outlets, a 60-watt USB-C port, two 15-watt USB-A ports, and DC output. It provides 154 watt-hours of energy storage in a package that’s described as either “about 3 lbs” or (by Amazon) 4.38 pounds (1.99 kg). But some of its reviews gave me pause.

Then I ran across the NECESPOW N90 and N150 Portable Power Stations, both of which feature LiFePO4 batteries. The 2-pound (0.91 kg) N90 costs $85 and is an 87-watt-hour power station with a 45-watt USB-C port, two USB-A ports, and an AC outlet—sadly, its AC outlet accepts only two-prong plugs, which would prevent it from running the Raceclock. The larger N150 has a 161-watt-hour capacity, a three-prong AC outlet, a 65-watt USB-C port, two USB-A ports, and two 12V DC ports. It’s on the heavier side at 5.5 pounds (2.49 kg) and costs $110.

After several hours of research, I finally unearthed the $89.99 TECKNET Portable Power Station, a 155-watt-hour, water bottle-sized device with a carrying handle that weighs 3.75 pounds (1.7 kg) and features a three-prong AC outlet, a 45-watt USB-C port, and three 18-watt USB-A ports. That seemed just about perfect for my needs, so I’ve ordered it and will find out how it performs in the real world at the next track meet. If you’re looking for one of these power stations, pay close attention to all the specifications because they vary widely.

TECKNET Power Station

The Battery I Already Had

While discussing the power station concept with my friend, I realized I had an appropriate battery in the car all along! With the appropriate charging cable! This is all a bit embarrassing, but I want to share it nonetheless because the solution could also be useful for you.

Our Subaru Outback has a nasty habit of running its battery down if a door doesn’t close entirely and leaves an interior light on for days (we mostly drive our Nissan Leaf because it’s electric, but it’s too small to carry all the gear I need for a track meet). After years of fussing with jumper cables or using a slow, old-style battery charger, I bought a 1200A Tacklife KP120 Jump Starter (the current model would seem to be the $89.99 T8 Pro), which is an 18,000 mAh battery that can start a car with a dead battery in seconds. It’s a brilliant device, and I’ve used it successfully with both the Outback and my 1959 Ford Powermaster 841 tractor. When not in use, it lives in the Outback, just in case the battery dies while we are away from home or need to jump-start someone else’s car.

Tacklife KP120 Jump Starter

The Tacklife jump starter also has a USB-C port, two USB-A ports, and a DC port. Alas, the USB-C port puts out only 15 watts (5 volts at 3 amps), which means it can’t charge the battery while the MacBook Pro is operating—macOS reports “Not charging” whenever it’s plugged in. When the MacBook Pro was asleep, the jump starter was able to add roughly 50% of a charge to the MacBook Pro’s battery, draining itself in the process.

That’s not useful to me, so my question was if it would slow the rate of discharge, something that seems impossible to discern using any software utilities I could find. (Both coconutBattery and iStat Menus can report on power usage but not in a way that enabled me to see the difference when the jump starter was plugged in.)

Instead, I came up with this test, which, despite the photo, I didn’t actually perform in the back of the car. First, with the MacBook Pro running from its internal battery, I played a YouTube video in Google Chrome for an hour, noting that the battery charge dropped from 100% to 56%. Then I ran the test again, this time with the MacBook Pro plugged into the 15-watt Tacklife jump starter the entire time. For the second test, the MacBook Pro’s battery charge dropped from 100% to just 91%, a significant improvement. At the end, the jump starter was still showing three LEDs of capacity, but it showed two flashing when I started to recharge it, so I’d guess that it was about a third depleted. I can’t say for certain that the jump starter would have provided all the power the MacBook Pro needed for the track meet, but it certainly would have helped a great deal.

Jump starter running MacBook Pro

With luck, the TECKNET power station will run the MacBook Pro for the next track meet, along with any of our other battery-powered devices that might run out of power unexpectedly. But at least I know that the Tacklife jump starter is worth pulling out in a pinch.

If you can imagine needing to jump-start your car or charge digital devices while on the road, I highly recommend something like the Tacklife jump starter. Just make sure you have the appropriate cables—I’ve added a Lightning cable to the USB-C and micro-USB cables that came with mine.

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Comments About Picking a Power Station for a MacBook Pro (And More)

Notable Replies

  1. Good article. Just one word of caution if you’re going to use your jump-starter for your computer. Make sure you don’t drain it so far that you can no longer jump-start the car or you’re going to feel very silly when calling for roadside assistance.

  2. I’d be interested to know how much noise the Technet makes in a quiet environment. I’m looking for something to support an aging iPhone used to video record meetings that typically run about an hour, and I’m wondering if its sound would be a distraction.

  3. Yeah, that would be a perfect storm of bad stuff—dead devices and a drained car battery. :-) I was worried the one day I had to drive the car because I forgot that the jump starter was in the house when I left, so I was hoping it wouldn’t be the day I’d need it. Generally speaking, I’ve mostly had to jump-start the car in our garage—leaving a door slightly ajar won’t be a problem during a day out.

    A good question, and I’ll report back. My impression from reading about so many of these products is that the fan will come on only when the AC outlet is in place, not the USB outlets. But we’ll see!

  4. I would recommend a power station like a Jackery or Rockpals. It’s not used to start a car, rather as a non-gas-powered station. There’s a large battery inside it which you charge with AC or car or solar panels. The models that put out max 500 watts will keep your 100 watt laptop running for over 4 hours. It’s also a good investment for the coming times when AC power will be spotty in your home. You can’t run appliances off it but light bulbs like 10 to 50 watts will run for hours.

  5. Regarding your option of Windows for ARM on a newer Mac, I can say that I was quite impressed with my move to Windows 11 for ARM under Parallels Desktop on my M1 MacBook Pro. I do embedded software development, and use an IDE that hasn’t been updated in over 10 years, with FTDI-based USB serial cables. I have not had any problems with the IDE interfacing with my embedded hardware.

    I’ve installed other non-ARM Windows software and so far haven’t run into any trouble with it.

    I also went down the path of the $199 battery replacement on my 5-year-old Intel MacBook Pro so I could continue to access my Intel-based Windows VMs for some time to come. In addition to a new battery, it also replaced the problematic keyboard with a few broken keycaps.

  6. I have been using Ego battery-powered tools for several years, including a lawnmower and a snowblower. When they released an inverter which used the batteries for these devices, I purchased it. I find that it works quite well to power a laptop for 1 to 2 hours on a charged 5000 mAh battery. I have two 5000 mAh batteries for the mower and two 7500 mAh batteries for the snowblower, so I can run my laptop for quite a long time across all four batteries. Note that this is the rather small 150w inverter (for $100) and not their much larger power station.

  7. Adam, for the ones that only had 2-prong outlets you could use a 3-prong to 2-prong adapter. Just attach a wire to a ground point on the power station and have an alligator clip on the other end that you clip to the ground tab on the adapter. However, it sounds like you have have found one that will meet your requirements.

  8. Thanks for the article. A good reminder to get a car start device. Our Prius battery went dead twice in 2020 for probably the same reason as you. (Rant: why can’t Toyota leverage that huge battery to start the car? The 12V battery is needed presumably to get the electronics going.)

    One nit: you probably won’t need power for your M1 MBA on a long flight if the reported battery lives are accurate.

  9. I couldn’t resist delving into the rathole of random-brand Chinese manufacturers on Amazon

    Sounds like fodder for the youtube channel. :laughing:

    Looking forward to hearing the results of the device you bought.

    …and how on earth can RS-232 still be a thing these days?


  10. I’ve a photography project on a remote island I am working on for the past year or so, no power there so a generator and petrol needed to be ferried over to cover periods of two weeks alone there ( along with water/food/camping/tools and kit).

    I ended up buying a Honda E2200i which features the all important inverter for charging electronics. I could isolate the generator to a point with a long cable and it’s among the quieter models out there but still a pain to schlep the fuel and to have the noise instead of the sea and bird life. And I had to run it for about four hours a day to keep my iPad Pro/GFX batteries/lamps/torch/power pack/iPhone all fully going.

    I only came across the Jackery 1000 after last winter which comes with optional solar panels to recharge. I’m very curious to pick one up and test to see if the power I needed could be handled (in the grey Irish winter!) by that combination. That would be about the same price as the Honda which I would sell off.

  11. I’ve been considering for backup power of a fridge or home electronics, a Bluetti power station. Normally I don’t promote something I don’t own yet, and had been lucky to have some neighbor I could throw an extension cord to for last outtage, that powered my fridge off their house generator. But I don’t feel the noise and fumes, and cost, was worth a Generac. So then some Youtubers I watch, that camp, use the Bluetti to power their gear, their laptop (MacbookPro) and edit then upload their videos, using either mifi devices to cellular net or satellite. Much less noise then a Honda generator, no pollution, can be right inside your tent or camper or house, and has ports for devices. Cost on par with new macs! :rofl:

  12. Very useful Neil, thank you.

  13. I recently bought a small inverter from Ryobi, Model RY18BI50A, which has a mains outlet (150W) and two USB-A charging ports (2.5 A). I already have a selection of their tools and 18V batteries so the inverter was a no-brainer. The good thing with this, of course, is that the batteries are instantly swappable, so you are not limited by the capacity of internal batteries and you can choose the battery capacity you need for the task. I have used it to power my M1 MacBook Pro and two iPads with good results. It is silent most of the time but a small, nearly inaudible, fan will operate if the loads are heavier. It also has a dimmable lamp and is very easy to use. I measured no current draw when the battery was connected and the inverter switched off, so leaving a battery installed will not run it down. Like all these small inverters it outputs a modified square wave but everything I have connected to it so far has operated normally.

  14. I’ve heard it’s occasionally a bit windy in Ireland. This looks like a it might work. (He looks like a photography enthusiast too… give him a call)

  15. Great article. And definitely a solution for some locations. Unfortunately, it does require quite a bit of open land (where I live, the kite would end up hitting trees or neighbors’ homes) and you need to be in a place where there is a steady supply of wind. I’d also love to see how much work is involved in launching the kites.

    So it’s probably not going to be a substitute for large-scale wind turbines, but definitely a great idea for those whose locations and power requirements make it practical.

  16. An interesting article Adam.
    For those of us that use battery powered hand tools:
    I use MANY Ryobi battery powered hand tools and last year bought a Ryobi battery powered lawn mower as a back up to my gas mower.
    The newest tools use a 40V battery pack. Over the last few years I had collected several of these large batteries, but last summer we had an enormous amount of rain here in the northeast and my sump pump was not operating when the power was out, however, the power wasn’t down long enough for me to get my gas generator going, or it was happening in the middle of the night.
    My solution was to utilize these batteries I already own by purchasing this:

    You simply slide the batteries into the slots (Can take up to four) and I was able to run my sump pump using this unit.
    I have also found I can run my chest freezer off of this, as well as charging laptops and other devices that are charged up using a USB cable.
    There is an APP for this on the app store that connects via BT that gives you info on the batteries and current charge condition.
    I too, looked at the Jackery at first, but then discovered this unit so I could use the batteries I already have.

    Rich Lefko

  17. When you test it, try to find out how many overcast days you can handle in a row. Please let us know the result of your test.

  18. @ace, please tell me your system sends racers’ results to them via fax.

  19. I don’t have one yet, but when I do I will. Most of the reports out there say to estimate by a factor of 3 the amount of quoted time to recharge fully.

  20. In terms of portable power banks I’ve been very happy with my Nitecore NB20000. It has enough to power up an MBPro 13 to 80% but I’ve never needed that. It’s rarely below 75% charge even after weeks of neglect.

  21. One option that might be worth trying when you eventually look at moving to a new Mac is Crossover. I’ve not used it myself, but it lets you run Windows apps on the Mac without having to install and maintain Windows. There’s a free trial so you can see if your software works.

  22. Hah! No, we only put up with old tech when there’s no better way to do it. It isn’t the goal to exhume old technologies otherwise.

    Interesting! I hadn’t thought about Crossover, and I’d be curious if it could handle all the external devices I plug in, but it’s certainly worth a try sometime.

    I still have to test this, sorry, but I did use the TECKNET at last night’s track meet. It was entirely successful in the sense of the MacBook Pro lasting, but…

    I chose to plug it into the 45-watt USB-C port and verified that it said Charging, but then I got caught up in everything else and didn’t check back. At the end of the meet, the TECKNET was down to 82% of its charge (from 100%), and the MacBook Pro was at about 25%. I found that a little troubling—the rate of discharge was slowed, but not hugely. You can see the relevant time in the battery usage graph below. I was surprised to see it using power in the middle of the night too, when it was closed and still in a bag.

    I had brought the MacBook Pro’s charger, and next time I’ll try plugging that into the AC outlet to see what it does.

  23. Following up on this old post to say that I have encountered some software for my job that doesn’t like Windows 11 ARM.

    The first is the software for Dataman IC device (e.g., EEPROM) programmers. I believe in this case it’s related to their USB drivers. Since I use their hardware infrequently, I just go back to my Windows 10 Intel VM on my old Intel MacBook Pro.

    The second was Microchip/Atmel Studio. In this case, I was unable to get the build process to work. IIRC, it was due to the make/gcc shell utilities failing to generate the necessary makefiles. I spent some time trying to troubleshoot it, but ultimately gave up and went back to the old Intel MacBook Pro.

    It’s definitely frustrating that there isn’t a solution to run my old Intel VMs on my ARM-based Mac.

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