How to use unprotected batteries!!!!!!!

[imont80]

You must see this link....Rechargeable Batteries & Battery Chargers - Protection circuit Module ( PCB ) for 3.7V Li-Polymer Battery (8.5A limit)-PCB1S

if it works, then you can save in batteries....

 

[imont80]

check this....


DealExtreme: $1.19 Charge/Discharge Protective Circuit Board for Rechargeable Li-Ion Batteries (13.4mm*1.7mm)

 

[Java_Az]

Technically speaking the title should say how to make unprotected batteries protected. But yes they work you can get them here in the states even but they will cost you more about 3 bucks a piece.

 

[Scottitude]

I didn't click on any of the links because there's no reasaon NOT to use actual protected batteries.

 

[Java_Az]

These chips are what are on protected batteries. If you took a protected wrapper off you would see one of these chips on it. Reason to make your own protected ones is it saves money. It costs you about 1/2 of what it would buy them with the protected circuit already on it. With the right soldering tool it would only take 10 seconds to solder one on. i know i could solder one on just as good if not better then that guy or gal in china at the factory doing it.

 

[Rocketman]

Actually I think they are spot welded on to the negative end of the cell and a false positive cap is used at the other end.
Spot welding, zap.
Soldering, heat, heat, heat.
Not recommended for batteries that could be damaged by heat, BLAM.

Use the protection board in a box mod but don't try soldering on a Li-ion cell.

 

[st0nedpenguin]

They're designed for building your own battery packs usually too, not for slapping on a single battery.

 

[duby]

Prevents 3.7V Li-ion or Li-polymer battery from over-charging, over-discharging,and from discharging current more than 14A

So 14Amps is a little too high for most batteries you'd want to use.
The DX one is 5Amps which is better.

You will also need to consider how you are charging your batteries. These circuits also protect from overcharge. If you build one into your mod, but are charging unprotected batteries on a cheap charger your battery could likely suffer catastrophic failure there as well.

Lastly, as to cost savings, a 2 pack of trustfire 14500's is $5.34. It doesn't look like the $0.50 you might save will be worth the soldiering time, but hey to each his own.