expired Posted by Dmytro_B • Aug 3, 2022
Aug 3, 2022 6:28 PM
Item 1 of 2
Item 1 of 2
expired Posted by Dmytro_B • Aug 3, 2022
Aug 3, 2022 6:28 PM
Energizer Recharge Basic Battery Charger, AAA and AA Batteries Charger, 2 AA Batteries Included $7.99 +FS w/Prime
$7.99
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Our community has rated this post as helpful. If you agree, why not thank NoDa
1) Serial charging. Does not charge each cell individually. Sends 2.8V through each pair of 2 1.4V batteries. If your batteries are not drained equally this will significantly overcharge one of them adding heat and causing lower capacity and much shorter life. Go for units with 4 separate bays with separate charge circuitry for each bay.
Non-serial chargers are available everywhere for as low as this price .
2) Not smart charger. Simply applies 170-200ma for 8 hours timed on AA or 80-100ma for 8 hours timed on AAA. If you have a 600mAh AAA it will overcharge it by 200ma. If you have a 2500mAh AA it will undercharge it by 900ma.
A smart charger with individual amp control can be had as low as $12 on Amazon right now. Most are in the $18-$45 range.
These both mean:
- No ability to control charge current (which should be max 1/2 capacity of the battery). E.g. 2000 mAh battery can be charged at up to 1Amp, 900 mAh battery should not be charged faster than 450mA.
- No detection of a drop in voltage towards the end of the charge cycle (delta -V / delta T). Way easy to overheat and damage.
This is a battery killer, as would be expected by a company that primarily sells batteries.
Deep techie reviews on a similar Enegerizer charger:
https://lygte-info.dk/review/Revi...%20UK.ht
Quote:
NiMh doesn't degrade nicely. It will randomly fail to hold a charge at all after a while especially if unused for a year. So it's a really bad idea to accumulate a stockpile of NiMh.
When possible, buy things that use 18650s and have built in charging, it is so much more convenient. If you need NiMh, use low self discharge cells if you don't expect to drain a battery fast.
Many remaining good uses of AA and AAA are in things you usually don't drain that fast, that you expect to be able to stash for a month or two and have it be ready.
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