Atypical Post This post isn’t only for you, but also for me. I have roughly sixteen 120V 1300-1500VA UPSes in my basement of various ages. They each take two SLA 12V ~8Ah batteries. As such, I need to replace those batteries periodically. Being a cheap bastard, I don’t buy the branded APC or CyberPower packs, but go for inexpensive generics from eBay or Amazon. In theory there’s no difference, but in practice some cheap batteries are, well, cheap. I’m attempting to figure out which off-brand brands work best. This Log Hence I’m going to start logging battery replacements to get an idea of which brand(s) represent the best value and longevity. This will always be a work in progress, because … Continue reading
This is a follow-up of sorts to my NiMH Battery Roundup video, except this time I’m looking at triple-As, and only one brand.
I was vexed by the fact that Amazon had EBL AAA cells with an 1100mAh capacity for only 7 cents more per cell than the otherwise-identical 800mAh variety. That didn’t make sense to me, and besides, 1100mAh is rather high for a AAA package size. Hence I bought a bunch of each and tested them.
The Bottom Line
The 1100mAh cells appear to be a big fat lie. The average capacity for those clocked in at 980mAh, with one cell showing as low as 946mAh and the highest at 1005mAh.
The 800mAh cells were respectable at an average of 809mAh, and less of a variance between cells.
Despite the fact that the “1100mAh” units were well under capacity, they are of course the better deal coming in at 852mAh per dollar with the 800mAh cells giving 749mAh per dollar.
I wish I had the time, inclination, or money to pit a whole bunch of AAA brands against each other, but I’m satisfied in imagining that quality scales from my AA cell results.
This video goes ridiculously in-depth on the subject of 10 particular models and brands of popular NiMH cells. It covers my recommendations, as well as an extensive dive into my testing methodology. Downloads As promised, here’s the spreadsheet that I mentioned in the video. Both links are to the same document, just in two different formats. Google Docs: https://drive.google.com/file/d/0B1fu729GXZJyY3RkX3ZNVlp5QjA/view Excel File: NiMH_Capacity_Analysis-Scott_Dotdot-20170908.xlsx My Recommendation Not to spoil the video, but if you’re here for a recommendation: At the current price of $21.99 for a sixteen pack, the EBL 2300mAh cells are the way to go. However, I’d also recommend the high capacity cells by Amazon and Sunlabz. I own a bunch of Panasonic Eneloop cells, and they are reliable, well … Continue reading
A look at some possibly-fake random “NiMH” AA cells from AliExpress, comparing them to Panasonic Eneloop cells.
From my somewhat limited testing, these little green guys had an actual capacity of about 342mAh, which is less than 10% of their claimed specification of 3800mAh (which is probably impossible anyhow for AA-sized NiMH cells.
The part about them perhaps not being real NiMH cells? That’s not the weirdest thing. Unlike most of my AliExpress purchases, these shipped from The Netherlands, despite the seller being called Shenzhen DeKang International Trade.
I'm a computer guy with a new house and a love of DIY projects. I like ranting, and long drives on your lawn.
I don't post everything I do, but when I do, I post it here. Maybe.