Philips Pronto RU950 Compatible Battery 4.8V 700mAh

Philips Pronto RU950 / RU960 / RU970 / RU980 — 4.8V Ni-MH Replacement Battery (2422 526 00148)

This is a 4.8V, 700mAh Ni-MH battery pack for the Philips Pronto series universal remote controls. It fits the RU950, RU960, RU970, and RU980, plus 25 additional Pronto variants sharing the same connector and cell configuration. Swap it in when the original pack no longer holds a charge and the remote stops responding across a normal operating distance.

• Pronto RU950–RU980 platform compatibility: These four Pronto models share the same 4-cell Ni-MH pack, connector pinout, and charge circuit. One battery SKU covers all of them because the charge termination logic and voltage rail are identical across the lineup.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the Pronto platform. The charge circuit accepted the pack without fault flags, and IR output voltage held steady at the LED driver stage throughout the test cycle.
• Multi-cell replacement tip: If your Pronto uses two separate AAA cells rather than a wired pack, replace both at the same time. Installing one new cell alongside a depleted cell forces the new cell to compensate, draining it faster and reducing overall output before either cell reaches end of life.

Why the Pronto RU950 IR signal weakens before the battery reads "dead"

Ni-MH cells in remote controls lose usable voltage gradually rather than dropping off a cliff. The Pronto's IR LED driver needs a stable voltage above roughly 3.8V across the pack to fire the emitter at full strength. As the pack ages, internal resistance rises and voltage sags under the brief high-current bursts the LED requires. The remote still powers the display and responds to button presses, but the IR signal becomes too weak to reliably reach the sensor on a TV or AV receiver from across the room. Replacing the pack restores full drive voltage to the LED circuit.

Pronto not responding at all after installing a new battery

The most common cause is reversed polarity on one or more cells. Ni-MH cells are easy to seat backwards — the positive terminal is a small raised nub and the negative end is flat, which is the opposite of what some users expect. Check each cell or the wired pack connector against the polarity markings stamped inside the battery compartment. If the pack connector is keyed, confirm it is fully seated and clicks into place — a half-seated connector reads as an open circuit to the remote's power rail.