101 has a nice deal on a LG HE2 Battery 2 Pack. They have them in stock and ready to ship for just $11.99. That breaks down to a little less than $6.00 per battery. A small price to pay for a solid battery. I have two of these that I use in my IPV2 & IPV Mini v2 and have had no problems at all. These are 2500mAh 20A batteries with a max pulse discharge of 35A.
LG HE2 Battery Specs:
- High Drain- Hybrid IMR
- Model: LG 18650 HE2
- Nominal Capacity: 2500mAh
- Max continuous discharge: 20A
- Nominal Voltage: 3.6V
- Full charge Voltage: 4.2V
- Operating Temperature (cell surface): Charge 0 ~ 50 C , Discharge -20 ~ 75 C
- Diameter : 18.3 + 0.2/-0.3 mm ( Max. 18.5 mm )
- Height : 65.0 ± 0.2 mm ( Max. 65.2 mm )
- Weight Max. 48.0 g
- Positive terminal: Flat top
- Battery size | shape: 18650 | cylindrical