Reddit reviews EN-EL15 EN EL15a RAVPower Battery Charger Set Compatible with Nikon d750, d7200, d7500, d850, d610, d500, MH-25a, d7200, z6, d810 Batteries (2-Pack, Micro USB Port, 2040mAh)

Versatile Charging Option: Common micro-USB input and the ability to charge with a USB wall charger, car charger, or external battery gives you more options than a standard battery charger. When recharging the batteries to 90% battery level, then it would switch to trickle charging and the LED indicator would turn into green lightMore Battery, More Photo: Triple your camera runtime with a complete backup package including two replacement battery and a dual battery charger to keep the empty ones chargingExactly Like The Original: But bigger capacity of 2040mAh/14.7w Battery, can charge inside the camera, or using the 2.1A input charger to maximize charging efficiencyStandard Compatibility: Made to the exact specification of Nikon EN-EL15 battery, compatible with Nikon 1 V1, D7100, D750, D7000, D7200, D7500, D810, D610, D800, D850, D600, D800e, D810a100% Safety Guarantee: Built with multiple circuit protection (over-charging, short-circuit, high-temperature, and surge protection), and high-quality, fire-resistant construction