my new batteries were pretty dang hot and the charger hadn't shut down after maybe 5 hours so I pulled them .. they were 1.45 volts and toasty . it's a lil handy rayovac charger that charges at 2- 2.8 volts 350mh for AA (i assume that means it needs 2 batteries at least to charge on side //// and 150 MH for AAA.
I've heard people say that batteries only get hot at the end of their charge .
these are new duraloops and I didn't use them first or even check voltage I just tossed them on a charger ..Do you think i should have used them before charging them ??
the charger stayed red and never hit green but at 1.45 i pulled them .. figuring they were done .. BUT what is the normal voltage of your eneloops fully charged if you have them
I've just stuck 8 on charge to see. They have been charged recently (All of them around 1.35V)so it shouldn't take long. The first four cells have seen a lot more use than the second four. These are the voltages immediately after the charger terminates the charge and will drop as the cells stand. I'll measure the voltages again in a couple of hours to see what they drop to on standing. The chargers are saying that all 8 cells are over 1.5V. But that is while current is being stuffed into the cells so the "real" voltage of the cell will be lower.
One reason i ask is because I have some eveready AA's and AAA's ,,don't think I've seen much over 1.409 or so .. the AAA's at maybe even 1.389 or just shy of 1.4 ..
i hadn't really paid attention because it was older stuff i had laying around
what about mixing same types but 2100 mah with 2300?/ i have been doing ..again because i really didn't care about the cells and wasn't mixing chemistries .. just capacities ... if they were hugely differentI tried to group them together ...BUT what does anyone think about charging a 2700 paired with a 1200..is it just roasting the 1200?
Duraloop is just what they call a duracell pre-charged LSD nimh battery.Proctor and Gamble who bought Duracell are rebadging eneloops with their name on them instead of building a LSd battery themselves .. the up side is they are real eneloops, they are fresh and 42% cheaper than eneloops ,).plus .. they aren't ever gonna be chinese "fake a loops "...
NiMh batteries that have been unused for a long time (like new batteries) often don't provide adequate voltage drop (-delta V) to the charger to signal end of charge. If the charger has no timer or heat detection stop to save the batteries, it will cook the batteries until you pull them. This is worse for low charge currents than for higher.
You can remedy this in two ways (from an article and also my own experience):
1. If the battery is charged, you start using it and then charge it.
2. If the battery is low on charge you charge it for half the normal time and then use it.
You can use 2. after using 1. to be sure with new batteries.
This is the curse of -deltaV charging. I much prefer Zero deltaV charging for NiMh but you have to build your own intelligent charger.
(-delta V) so that's what they call that bounce ..a negative delta V....huh .. I knew that the voltage would climb and then bounce backwards ..down > sending the signal to the charger to shut itself off . I knew it about lithium battery charging .. have no idea why I would asssume nimh would be any different .. mmmm -delta V ... big words to impress women with ..
The easy answer is this ...whee!!! i got new batteries
the last one got installed it's time to work him out . i may just work these 4 out over the next week or so and keep track of the numbers just for fun...