Telekom T-Sinus 700 Micro Compatible Battery 3.7V 1300mAh

Telekom T-Sinus 700 Micro Series — 3.7V Li-ion Replacement Battery (V30145-K1310-X250)

This 3.7V, 1300mAh Li-ion battery replaces the original pack in the Telekom T-Sinus 700 Micro cordless DECT handset. It also fits the T-Sinus 710X Micro, 710XA Micro, and 700m. Physical dimensions are 53.60 × 36.95 × 7.95mm — verify against your existing pack before installing.

• T-Sinus 700 and 710 Micro family: These models share the same battery bay dimensions, 3.7V supply rail, and connector orientation. One battery part number — V30145-K1310-X250 or the alternate V30145-K1310-X229 — covers the full range listed above.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the T-Sinus 700 Micro platform. The BMS accepted the handset's charge current without interruption and maintained stable voltage through RF transmit bursts.
• First charge after installation: Place the handset in the base station immediately after fitting this battery and leave it there for a full 16 hours before first use. Li-ion cells shipped in a partially discharged storage state — the base needs time to bring the pack to rated capacity from that starting point.

Talk time shorter than expected after fitting a new Li-ion pack

A freshly installed Li-ion cell often delivers noticeably less talk time on the first few charges — this is not a fault. The cell ships at around 30–50% state of charge, and one partial cycle does not condition it to full capacity. Run two to three complete charge and discharge cycles through normal handset use. By the third cycle, the pack stabilises at its rated 1300mAh output.

Handset loses DECT pairing after battery replacement

Removing the battery completely cuts power to the handset's memory, which can erase the pairing record on some DECT phones. The T-Sinus base station does not automatically re-pair a handset it no longer recognises. To fix this, hold the paging button on the base for three seconds, then follow the registration sequence in the handset menu — usually under Settings → Register Handset. Complete the process within 60 seconds of pressing the base button.