email4walker

I have a mini (1/16 scale) 7.2 nimh battery and a Losi charger (see pics). When I charge any mini 7.2, it will quick charge for about 1 min and then go to trickle charge. Is this "False Peaking" normal?

Once it is trickle charging, after about 45 min, the battery is warm/hot. Thats when I take it off and drive my car. The battery appears to be fully charged. Should I continue to charge the battery this way? The battery SEEMs fine, but I'm not sure.

Any thoughts to fix this?

Thanks in advance.

guver

My Feedback: (325)

It must not really be "trickling" if it gets hot. It is probably fast chargeing (to charge in 45 minutes and get hot)

If unsure maybe you can post the specs for the charger and battery. It sounds like maybe it is doing a "battery test" for the first minute?

Specs such a mah for battery and ma for charger will help.

email4walker

The battery is 1500 mah and (it says) supposed to be charged at 1 mah(fast charge).
The charger is 1.2 mah.

t9dragon

My Feedback: (11)

You are fine using that charger for the battery. If the battery is getting warm there shouldn't be a problem, now if the battery was getting to hot to touch then you would have a problem. Also you should look at getting a better charger in the future.

guver

My Feedback: (325)

According to the numbers it should take an hr or more to charge, but 45 minutes isn't too far off. It sounds like all is well.

email4walker

Will the charge time (roughly) be the same for a 1100 mah battery?

guver

My Feedback: (325)

no, it would be a bit less than an hr (at the same rate)

amps means 1 hr. 1 amp = 1000 mah in one hour.

email4walker

Thanks for all the input!

One last question: charging a Radio (TX) battery, AA 2100 mah. Can I use a adapter that is 12V at 1000ma? 12V 300ma?
How long will it take to charge?

Thanks.

guver

My Feedback: (325)

1000 ma is probably too fast, 300 ma is perfect (300 ma = 300 mah per hour) so to deliver 2100 would be 7 hrs.

I think the 12 voltx300 would be nice. Hard to estimate times though because it is hard to get exact figures especially how much charge is remaining in the battery.

email4walker

Thanks for all your help guys!

email4walker

Oh, I forgot to say it is 8 AA at 2100mah. Thats still ok right, the charging specs I mean?

guver

My Feedback: (325)

Yep, 12 volts is good for 8 cells.

email4walker

Sweet. Thanks!

rschoi_75

guver, I know its just a typ-o on your part, but to clear things up a bit...

1 amp hour (ah) = 1000 milliamps in one hour (mah).

guver

My Feedback: (325)

I'll erase the "m" or change it to 1000 thanks. That could be a disatrous error.