The Series 7 SL-50 is a powerful battery pack designed to work with the Series 7 system. This battery offers an LED readout and 50Wh of power.
| Chemistry | Lithium-Ion |
| Output Voltage | 7.2VDC |
| Capacity | 7000mAh |
| Dimensions (WxHxD) | 1.5 x 2.4 x 2.8" (3.8 x 6 x 7.1cm) |
| Weight | 0.7 lbs (317g) |