Button 3, 6V ITA 2450 rechargeable Li-ion battery - Batteries4pro
Factory Direct Low Self-Discharge Lir2450 Lir2032 Lir2025 Rechargeable 3.7V 3.6V 110mAh Lithium Ion Coin Cell Battery with CE and BSCI - China Lithium Battery and Cell Battery price | Made-in-China.com