Kastar MX990 camera battery 1900mAh 3.7V 7.03Wh 1-Pack

Kastar MX990 lithium-ion camera battery

The Kastar MX990 is a 3.7 V lithium-ion replacement cell rated at 1900 mAh and 7.03 Wh. It fits devices that originally used the Acoustic Research ARRX18G, Nevo HK-NP60-850 or One For All SN03043TF packs. Photographers and remote-control owners who need a direct drop-in spare for compatible Nevo C3, UEI-NEVO C3, One For All ARRX18G, URC 11-8603, URC 8603 or Xsight Touch units will find it suitable.

Sustained discharge performance

The cell delivers its rated 1900 mAh capacity under normal operating loads, maintaining a stable 3.7 V output throughout most of the discharge curve. Built-in protection circuitry guards against over-charge, over-discharge, over-voltage, over-current and over-heating, so the voltage remains steady during extended shooting or control sessions without sudden drops. The 7.03 Wh energy rating reflects real-world usable capacity rather than a short-burst peak.

Thermal behaviour and power draw

During typical use the battery runs at modest temperatures thanks to the integrated safety circuit that limits current and voltage excursions. No active cooling is required and the pack operates silently. Power draw follows the host device's demand, and the protection features prevent excessive heat build-up even during prolonged operation, keeping the cell within safe thermal limits.