Telstra Freedom 120 RB64 Replacement Battery 3.6V 600mAh

Telstra Freedom 120 / 220 / 250 / 320 — 3.6V Ni-MH Replacement Battery (RB64 / RBP10)

This is a 3.6V, 600mAh Ni-MH battery for Telstra Freedom series cordless phones. It fits the Freedom 120, 220, 250, and 320 handsets, plus five additional models in the same range. Install it when the original pack no longer holds a charge or the handset dies faster than it used to.

• Freedom series compatibility: These handsets share the same 3.6V three-cell Ni-MH pack format, the same connector pinout, and the same base-station charging circuit. One battery part number covers the full range because the voltage rail and physical form factor are identical across models.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a Freedom handset. The BMS accepted the charge from the base station without error, and voltage held steady through the RF transmit bursts during a call.
• First charge protocol for Ni-MH handsets: After installing, seat the handset in the base and leave it for a full 16 hours before use. Ni-MH cells shipped in a partially discharged state need a slow first charge to reach rated capacity — cutting it short means the first few cycles will feel shorter than expected.

Range dropping after a battery swap in Freedom handsets

Ni-MH voltage sags under RF transmit load — especially in the first few cycles before the cells are conditioned. When voltage dips below the handset's transmit threshold, the radio pulls less power to compensate, and range shrinks noticeably. This is not a fault with the battery or the phone. Run three to five full charge and discharge cycles and the voltage stability improves. After conditioning, the handset should reach the same range as the original pack.

Base station showing no-charge or error light with a new pack

Ni-MH batteries self-discharge during storage and often arrive below 3.0V. Some Freedom base stations check pack voltage before starting the charge cycle — if the voltage reads too low, the base flags an error instead of charging. The fix is a trickle charge: place the handset in the base, leave it undisturbed for two hours, then remove and reseat it. This nudges the pack voltage high enough for the base station to accept it and begin a normal charge cycle.