Quote:
Originally Posted by leftright
First of all, there are Li-Ion and Li Ion Polymer or Li-Po, most mobile devices use Li-Po.
All these batteries have built power regulating mechanisms, to prevent overcharging and overheating.
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Actually there is not much difference between "Li-Ion and Li Ion Polymer or Li-Po"
Many gadgets, phones and ereaders use bare cells with no controller. There are three types:
1) Cells with nothing.
2) Cells with a sensor. Usually three wires.
3) Cells with an internal charge controller, but no explicit host communications.
4) Cells with a controller and host communication. Typically 4 or more connections.
You can't assume you can parallel any of these. Cylindrical Metal can vs plastic pouch makes little difference.
Loads of Electronics people know very little about rechargeable lithium. You are giving advice that might burn down someone's house. Even if a particular model has type (3) and the particular host PCB and controller allows safe paralleling of the cell packs, that doesn't mean it applies to other gadgets that use the same cell. Types 1, 2 and 4 can't be paralleled safely. Often type 3 can't pe put in parallel either, the main PCB HW/SW isn't designed for it.
Even if it seems to work for you it may not be safe.