can the Ultrafire WF-139 charge one battery at a time?

MstrHnky · May 29, 2008

i have an ultrafire wf-139, and was wondering if i can charge one battery at a time (only one battery in the unit) or if i have to have both in there together.

thanks for the help.

USM0083 · May 29, 2008

Yes, you can charge one at a time.

MstrHnky · May 29, 2008

thanks. i just picked up two aw rcr123's and one was greenlit, the other still red. i didn't want to leave the green battery in the charger.

thanks again!

Fusion_m8 · May 30, 2008

Yes it can.... just to double confirm.:twothumbs

With Li-Ons, its best to take them off charge once the light goes green, do not leave the Li-Ons in there to trickle charge, this can cause the cells to fail prematurely due to over charging above 4.20v

kramer5150 · May 31, 2008

Fusion_m8 said:
Yes it can.... just to double confirm.:twothumbs

With Li-Ons, its best to take them off charge once the light goes green, do not leave the Li-Ons in there to trickle charge, this can cause the cells to fail prematurely due to over charging above 4.20v

oo:

oo: I didn't know it did that. Good to know, thanks.

OP, yes you can charge cells one at a time. Its a great charger for the $ IMHO.

lightforce2 · Jun 1, 2008

there have been reports that the wf-139 will continue to trickle charge after charging to 4.20v however these may have been older units, my wf-139 will stop all charging current at 4.20v. It pays to check your charger with a multi meter, if available.

Buck · Jun 3, 2008

lightforce2 said:
there have been reports that the wf-139 will continue to trickle charge after charging to 4.20v however these may have been older units, my wf-139 will stop all charging current at 4.20v. It pays to check your charger with a multi meter, if available.

Does this have to be done in current setup, or can you just check the voltage?

can the Ultrafire WF-139 charge one battery at a time?

MstrHnky

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USM0083

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MstrHnky

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Fusion_m8

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kramer5150

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lightforce2

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Buck

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