Anyone still use their nano charger?

[Yapo]

i tried using my old nano charger(NBC-A001) to charge my protected ultrafire 3.6v 880mAh rcr123 batteries and the light is red while charging but after 5hrs it hadnt turned green as i thought it should so i checked the voltage of the cell with a multimeter and it was about at 4.5V...i thought the charger was meant to auto stop at 4.2V? i put the cell into a flashlight and it seems to work fine but is this dangerous to be charging it to so high? i tried putting another battery, this time one with 750mAh which was at abit less than 3V into the charger for a min and i took it out and checked the voltage and it was at 4V...is it meant to jump up that fast? i put the battery back in n left it for 4.5 hrs and still no green light so i took it off and it read 4.6V... should i try dischargin the cells on a flashlight to about 4.2V? or leave them as they are?

i'll try charging another flat battery now and check the voltage each hr. which i probably should have done in the first place...

EDIT...i just charged a 750mAh battery for 75mins and the voltage is now 4.2V...i think i might just leave it at that but shouldnt it take longer then that to charge?

 

[Yapo]

still no comments?

the first battery, protected ultrafire 3.6v 880mAh rcr123, seems to be dead now...it was found dead after the last time i charged it on a DSD charger so i tried chargin it again on the nano...i used it in a flashlight for a few mins till the voltage dropped to about 4.3V and now its dead and doesnt light up the flashlight any more. i guess i'll be chuckin this one out!

...but the 2nd one i charged which was an unbranded protected 3.6V 750mAh which was charged to 4.6V still seems fine now after ive run it down to 4.2V in a flashlight.

 

[worldedit]

Mine wasnt doing that. Id throw it away since this is very dangerous.

 

[Yapo]

Mine wasnt doing that. Id throw it away since this is very dangerous.

you mean the charger? or the batteries that got charged to 4.5V+

 

[Anders]

Hello Yapo.

It looks like the charger isn't doing what it should do.
The protected cells you are charging also doesn't do what you paid for, PROTECT you and your home and family.

What do you use to test voltage of the cells, sometimes a DVM show funny numbers when the battery in the DVM is empty or near end.

If you got correct numbers from your voltmeter, don't expect more than a few more cykles from your cells.


You can get a more expensive charger and enjoy long life from your cells, or you can go for a cheaper charger and end up paying more for your cells due to wearing them out faster. The more expensive charger option may be the best value in the long run.

Anders

 

[Yapo]

well on my unbranded 750mAh cells the voltage usually shows between 2.7-3V when i check a flat battery...but with my ultrafire 880mAh the voltage usually cant be read when the protection kicks in...i usually charge them in a DSD charger but my brother took it overseas with him for a few months so i decided to try the nano charger...yeh i think my multimeter is low on battery and it cant give me a reading with 2decimal places but it gives me a fairly consistent reading with 1decimal place.

...well i might get a pair or 2 of new batteries, maybe AWs, when i the charger comes back...I should have enough cells to last me till then or would you recommend a better charger? for 16340/18650...

 

[worldedit]

My nano charger used to charge to 4.2V. Cant check anything else since i destroyed it. (My fault, not the chargers)

 

[Anders]

Hello Yapo.

Here you can read about Pila IBC, a much better choise.

Anders

 

[matrixshaman]

IIRC I think my nano charger was over charging sometimes. I'm mostly using a Ultrafire WF-138 now and it seems to go 'green' at around 4.1 to 4.15 volts. I think if I leave it long after it may trickle up a bit more but most times that I recall it has always been under 4.2 volts. I've heard some people say theirs went higher so YMMV. But if you get a good one of these they are very nice chargers and also do the 3.0 volt RCR's - just make sure you don't forget where it's at or you can a 3 volt I think. While I've never opted for the Pila it definitely has a great rep.