Test of 196 AA batteries - Page 1
Forum section: electronics / general

author: Jiri Bekr
author_rank: Contributor
timestamp: December 22, 2022, 10:31:44 pm
content: Hello guys,When it comes to buying batteries for our instruments, most people stick to branded alkalines. There are also cheap guys, buying the cheapest ones in amounts dozens. And the smarter ones use NiMHs. Is a brand really a warranty for good quality? Are the claims written on the package real? Manufacturers keep showing graphs and charts on how their batteries beat all the others, and how their batteries are made with top of the line technology. These bold claims are however never backed up by any factual data.I have decided to put an end to this. The only way to finally tell the good and bad cells apart is laboratory test.I have tested85 Alkalines, 79 NiMHs, 18 Zinc-Carbons, 8 Lithiums and 8 others(NiZn and lithium-ion with stepdown). They were all tested forcapacity at constant current of 100mA, 250mA, 500mA and 1A down to 0,6V cutoff. Internal resistance was measured at DC load of 1Aat 100% remaining capacity (room temp).The test has outputs inone YouTube video(attachment #1 = thumbnail for the video, since links here don't show thumbnails) andfive additional tables with data, one table for each chemistry. Unfortunately, EEVBlog forum has limit of 5MB for all attachments, and my tables have 11,8MB. So I have only added Zinc Carbon table (#2 attachment)All the data are freely available to download strictly for personal, non-commercial use, so anyone can go through the data and pick his favorites he will be buying fron now on.The test continues in:Recharging non-rchg batteries (done, will be public soon)Self discharge test of rechargeables (done, will be public with test below)Battery cycle life (currently at 350 cycles for NiMHs, lower amounts for NiZn and Lithium)Weather withstand test in -20°c for capacity and resistance change (not started)High current test up to 15A (10% done, postponed, may be scrapped)The YouTube video is here:https://youtu.be/CF5CShn-U7MThe tables are on my Google Drive in PNG:https://drive.google.com/drive/folders/1-A1No1G6FDwDjiF1ErPQiVL5EbO5ewy_?usp=sharingI hope that two years of my effort, and approx 1 500 USD spent just on batteries will help as many people as possible. So please, to honor this work, use the informations for your own good.Thank you and wish you as many watthours as possible

author: puddingfox
author_rank: Newbie
timestamp: January 05, 2023, 07:55:34 pm
content: That is a lot of testing! Can you provide a translation of the headers in your tables? I see what some of them are but cannot figure out others.

author: Jiri Bekr
author_rank: Contributor
timestamp: January 08, 2023, 04:26:59 pm
content: Making two sets of tables in different languages is not possible for me (too much data). So I hope that following text translation key would be enough, I apologize for the inconvenience. My upcoming tests have bilingual tables (just like my test of more than 100 DC-DC converters from aliexpress, will be released in Q1 or Q2 2023)Translation:1st column - number | 2nd - Price in CZK, divide by 23 to get USD | 3rd - Name | Name 2 | Principle (chemistry) | Nominal capacity | Expiry date (mfg date for rechargeables) | Internal resistance in mR (DC method) | 4x capacities at respective currents | Kč/Ah multiply by 4 to get cent / Ah, they are for both low and high current discharge | I (Ri) is maximum calculated current for low resistance load, based on Ri | Inom is maximum calculated current based on difference between C(1A) and C(100mA). The current is calculated so the battery would still have at least some usable capacity. | celk kčah is like average of the previous, for the people who just want one type of battery for all