Hobby King HK-010 is a compact and accurate wattmeter and power analyzer, and also includes an inbuilt balancer. It's robust alloy case make it a good carry-anywhere item.
Working voltage range: 0-60V
Working current range: 0-100A
Cell count: 1-6S
Battery type: LiPo/LiFe/LiIon
Working temperature range: -20~50°C