Panasonic Lumix DMC-LS1S Service Manual page 13

Replacement batteries must be of same type and manufacture.
They must be fitted in the same manner and location as the original
battery, with the correct polarity contacts observed.
Do not attempt to re-charge the old battery or re-use it for any other
purpose.
It should be disposed of in waste products destined for burial
rather than incineration.
NOTE:
Above caution are also applicable for below batteries which is for DMC-LS1 all series, as well.
1. AA Oxyride batteries
2. AA Alkaline batteries
3. AA Rechargeable Ni-MH (nickel-metal hydride) batteries
5. OPERATING GUIDE
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