Spare 400mAh battery for the Swiss & Slim.
• Battery min. voltage: 4.35V
• Battery rated voltage: 3.7V
• Standard capacity: 2950mAh
• Minimum capacity: 2850mAh
These are original LG HE4 18650 high drain batteries with lower internal resistance values that perform extremely well under harder workloads. A step up from HE2 batteries, the HE4 cells are also noteworthy for operating at lower temperatures during peak output periods.