Hobby King HK-010 is (yet another) compact and accurate wattmeter and power analyzer, but this one also includes an inbuilt balancer.
Its 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: -20~50Â°C