Increase battery of usb charger

Thread Starter

yitmat

Joined Aug 5, 2012
6
I have a portable usb charger that has these specs:
Li-ion 3.6V 1200 mAh
Input: DC 5V 400 mAh
Output: DC 5V 450 mAh

Can i add an old battery that has 3.7V and 1150mAh to the charger and increase the battery life of it?
Would it be safe to just hook up the the negs to negs and pos to pos?
Also what would be a better way to increase battery of the charger without buying a new unit?
 

Thread Starter

yitmat

Joined Aug 5, 2012
6
Seems ok to me.
I also thought it would be okay to charge the batteries through the 5V input on the portable charger, however would the output of the charger being 5V have conflict with the combined power of 7.4V rather than the normal 3.6V? Overload?

Also would it be okay if I increased it futhermore with a 3.7V 1000mAh Li-ion battery and a 3.7V 1150mAh Li-ion battery? Total of 14.8V and 4500mAh. I really want to get some serious juice out of my charger.
 
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Thread Starter

yitmat

Joined Aug 5, 2012
6
I have heard about resistors and regulators, but im not sure if i would need them in the situtation. If the extra load does need it, could someone point meout how i could acheve it?
 

Thread Starter

yitmat

Joined Aug 5, 2012
6
Opps, i thought it made sense to add them together. :(

So would 4 batteries together all with different mAh charge effiecently, or would it lead to over charging the lower mAh batteries?

I read somewhere about bridging(i think that is what it was called) the pos/neg with a pos thats already connected to a neg. Would that be neccessary in this situtation?

Sorry for all the questions. Much questions from a much confused mind. :p
 

MrChips

Joined Oct 2, 2009
30,710
3.6V 1200mAH and 3.7V 1150mAH are basically the same.
Make sure the batteries are the same technology and same rating.
 
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