Extra Battery Pack 4,000 mAh

The 4,000 mAh battery pack is the most powerful option within the BERTSCHAT® range. Designed for extreme cold conditions and prolonged use, this battery delivers maximum performance and extended heating time. Ideal for those who demand the highest level of reliability and warmth.

The 4,000 mAh battery operates at 7.4V and delivers a total energy capacity of approximately 29.6 Wh, making it the most powerful option within the BERTSCHAT® range. Designed for maximum performance, it provides extended heating duration in cold to extreme cold conditions. The battery is rechargeable via USB-C, allowing you to easily charge it at home or on the go using a power bank.

With dimensions of 64.1 x 58.6 x 19.3 mm and a weight of 129 grams, this battery is built for users who prioritize maximum power and long-lasting performance.

Heating duration varies per product and usage. For an estimated heating time, we recommend consulting the specific product page.