The NNTN8128 is a 1900 mAh slim Li-Ion submersible battery.
IMPRES batteries when used with an IMPRES charger provide automatic, adaptive reconditioning, end-of-life display, and other advanced features. Data is stored in the battery and communicated to the charger via a unique IMPRES communication protocol which is designed to maximize talk time and optimize battery cycle life - all automatically. Automated maintenance and a six-month extended capacity warranty when used with IMPRES chargers.