About this replacement
Tactacam REVEAL SK / REVEAL X Series — 7.4V Li-ion Replacement Battery (EM6)
This is a 7.4V, 5000mAh Li-ion replacement battery for the Tactacam REVEAL SK, REVEAL X, REVEAL X Pro, and REVEAL XB trail and action cameras. It uses OEM part numbers EM6 and EM6-D and fits directly into the original battery slot. The cell chemistry and BMS parameters match the camera's charge controller expectations.
- REVEAL SK / X / X Pro / XB compatibility: These models share the same battery form factor, voltage rail, and connector layout. The EM6 fits all of them without adapter hardware or wiring changes.
- Bench tested on actual hardware: We cycled this battery through charge and discharge on compatible hardware. The BMS held cutoff voltage correctly and the protection circuit tripped as expected on overload — no thermal events.
- Cold-weather field use tip: Keep this battery in an inner pocket until you're ready to shoot. Li-ion cells lose 15–25% usable capacity at 0°C and up to 40% at −20°C. A body-temperature battery installed just before use will deliver significantly more capacity than one that's been sitting in a cold pack or vehicle overnight.
Why REVEAL cameras drain faster in cold outdoor conditions
Li-ion cells slow their electrochemical reaction rate as temperature drops. Below 0°C, internal resistance rises sharply, which means the cell delivers less usable voltage under load even if the state of charge reads full. The REVEAL's firmware reads voltage to estimate charge level, so elevated internal resistance causes the displayed percentage to drop faster than the actual stored energy — it's not a faulty battery, it's physics. Warming the battery before deployment is the most effective fix.
Camera won't boot after the battery sat cold in storage
If a Li-ion cell discharges below approximately 2.5V per cell (5.0V total for a 2S pack like this one) during cold storage, the BMS may lock out the output to protect the cells. The camera won't turn on — not because it's broken, but because the protection circuit has tripped. Connect the battery to a compatible charger and leave it for 20–30 minutes. Most chargers apply a low-current trickle at this stage to recover the cell voltage above the BMS threshold before switching to normal charge current.