This is the replacement Lithium Ion Battery for second generation InTENSity devices. It is rechargeable and compatible with the Li-ion Battery Charger (#TA2000C). 3.7V nominal voltage and 4.2V charging voltage limit 900mAh (3.33wh) battery capacity Compatible with second generation InTENSity devices and the Li-ion Battery Charger Electrotherapy unit and battery charger NOT included For a replacement battery for your second generation InTENSity device, purchase the Lithium Ion Battery.
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