LIR3048 Coin Cell, 30mm, 180mAh, 180mA, 3.7V, Grade A Lithium-ion Rechargeable Button Cell
Traditionally coin/button cells were one-time use, non-rechargeable lithium batteries. However, in many cases a rechargeable coin cell is favorable. The new rechargeable LIR button cell uses lithium-ions to produce energy and offers high energy density (92Wh/kg), high voltage (3.7V), and a high cycle life (~500 cycles).