Ultimaxx 1720mAh 3.85V camera battery for GoPro HERO9 Black

Compatible replacement battery

The Ultimaxx 1720mAh 3.85V lithium-ion cell is built as a direct replacement for the GoPro HERO9 Black. It supplies the same voltage and capacity as the original pack so the camera reports remaining charge accurately on its built-in display. Photographers and videographers who need a spare or a fresh unit for extended shoots can rely on this drop-in fit. No memory effect means the cell can be topped up at any point without reducing its usable lifespan.

Single-camera power limit

The pack only powers one HERO9 Black at a time and must be recharged inside the camera or with a dedicated charger that the user already owns. Capacity is fixed at 1720mAh so recording time cannot be extended beyond what that figure allows. Users who run multiple cameras simultaneously or need continuous power for multi-hour events will have to carry and manage several cells. There is no pass-through charging or external power input on this battery itself.

Premium cells and everyday handling

Premium-grade cells are used to deliver consistent output and to eliminate the memory effect that degrades older chemistries. The battery slots into the HERO9 battery compartment with the same latch mechanism as the stock unit so swaps take seconds even with cold or wet fingers. Contacts are gold-plated to resist corrosion from humidity and salt spray common in action-sport environments. The rugged housing protects the internal structure from the shocks and vibration typical of helmet, chest and handlebar mounts.