I am not an EE, bit if none of those 4 packs of AAA are charging, then it is the charger or user error (sorry had to put that in there). But more than likley it is the charger design or default. Get a different brand/model charger and see if that works, preferably the same company as the batts.Last year I purchased several 4 packs of AAA NiMH batteries on sale.
These were stored properly in the original package,
Got them out today and tried to charge them in a new AA AAA wall plug in unit, the charger defaulted on all of them and would not charge the AAAs.
The charger works fine because I just charged some new NiMH AAs with no problems...also the mA of the AAAs are compatible with the charger.
Why are these unused 1 year old NiMH AAAs not taking a charge?
Thanks for your help.