BTI Notebook Battery – 11.52V Li-Polymer 3750mAhBTI Notebook Battery 11. 52V Li Polymer 3750mAh Power your notebook with confidence using the BTI Battery, engineered to deliver dependable, rechargeable energy when you need it most. Designed for maximum productivity, this Li Polymer battery combines compact form with robust power, making it a reliable replacement option for select notebook models that require a proprietary battery size. With a nominal 11. 52 V DC output and a capacity of 3750 mAh,