I have four (4) AmazonBasics AA batteries. I go to charge them in my Maha-Powerex C9000 charger and every function the charger is set on produces "HIGH' for these batteries. Are they useless? Also what does the "1.2v min 2400mah" mean on batteries?
How long have these been in use, how many times charging?I have four (4) AmazonBasics AA batteries. I go to charge them in my Maha-Powerex C9000 charger and every function the charger is set on produces "HIGH' for these batteries. Are they useless? Also what does the "1.2v min 2400mah" mean on batteries?
Reason I ask is older cells with higher internal resistance at some point do not like charging at high rate. I notice C9000 charger hasHow long have these been in use, how many times charging?
The PE C9000 Wizard One is supposed to reject NiMH batteries when their 'voltage' hits 2.00v. I've managed to tweak that to about 2.06-2.10v, by removing and reinserting the batteries, after they're rejected and this process lowers the I.R. enough to get them to charge, but it's only a temporary fix.I have a Powerex and think its overly sensitive to high internal resistance, but it is probably a good indicator the cells aren't top performers anymore. The cells probably are not great for flashlights anymore, but if they are Low self discharge (LSD) cells and you use a different/dumber charger, and they will probably still work OK in low drain devices like remotes and wireless mice.
every function the charger is set on produces "HIGH' for these batteries.
Use a dumb charger if you want to eventually kill them completely.
It looks like over half my stash of circa 2006 Eneloop AAA (8 of 12) are high impedance now. The AA's are doing better. The Pros AAA that are even newer have almost all gone high impedance.
Eneloop Pro are intended for very special circumstances, when that extra frankly negligible capacity of 500mAh could matter.
The IR (measured @1 kHz AC) of a healthy Eneloop is about 20 mOhm. Eneloop Pros have an IR of about 30 mOhm. So, standard Eneloops are more suitable for high drain devices, such as camera flash units. Ordinary Eneloops also have much better cycle life. Some years ago, I killed a couple of sets of Eneloop Pro in my flashes for something like 60-70 cycles. They don't like high discharge rates at all, actually. Today, I have only one set of Eneloop Pro cells, that I use in my kitchen radio that consumes 80-100 mA at normal listening levels. In this application they perform very well. The extra capacity is noticeable, and if charged properly, you can expect a decent cycle life, but nothing like an ordinary Eneloops.I use them in my camera flash unit, but care (almost) nothing about capacity. I use them because I believe they provide higher current output, at least 'pulsed' if not 'continuous', and believe it reduces my flash minimum cycle (recharge) time. I have no manufacturer-supplied data / graphs to show that, because they don't seem inclined to publish very complete specs on their products, but have gathered this from independent testing by others (including with flash units). It's not just about capacity. Power matters. And yes, mine have a relatively short lifespan, but they won't ruin my expensive flash either.