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Rectangular lithium battery pack, matte finish, 51.6 by 39.97 by 4.5 mm

Estry

Estry C66 standard battery 750mAh 3.7V

SKU CH-4K0C-WZEVV MPN C66

Replacement lithium battery for Siemens C66, C81, CV65, C72, AX72, S66, CXT70, CXT65, CV72, S75, CX70, CXV70 and CT66 handsets, 750mAh at 3.7V with overcharge and short-circuit protection

  • Battery pack size1-pack
  • Battery typeLithium
  • Battery capacity750 mAh
  • Battery voltage rating3.7
  • Product typeBatteries
  • Fits Siemens C66 C81 CV65 C72 AX72 S66 CXT70 CXT65 CV72 S75 CX70 CXV70 CT66
  • Replaces original part numbers V30145-K1310-X329 V30145-K1310-X321 EBA-770 L36880-N2501-A110 V30145-K1310-X289
  • 750mAh 3.7V lithium cell delivers 2.78Wh for reliable talk and standby time
  • Built-in overcharge over-discharge over-voltage and short-circuit protection safeguards the handset
  • Certified to ISO9001 RoHS CE UN38.3 and MSDS for safety and quality assurance

Replacement battery for Siemens handsets

The Estry C66 is a lithium-ion battery rated at 750mAh and 3.7V, built to match the original specifications for a range of Siemens cordless phones. It comes as a single pack and includes overcharge, over-discharge, over-voltage and short-circuit protection for safe operation. The cell measures 51.6 x 39.97 x 4.5mm and weighs 40.0g, with a 2.78Wh energy rating. Certifications include ISO9001, RoHS, CE, UN38.3 and MSDS.

Suits owners of listed Siemens models needing

This battery fits the C66, C81, CV65, C72, AX72, S66, CXT70, CXT65, CV72, S75, CX70, CXV70 and CT66 handsets, plus the extensive list of OEM part numbers supplied by the manufacturer. It is not for users whose phone model or original part number does not appear in that compatibility list, or for devices requiring a different voltage, capacity or physical form factor.

Capacity and voltage determine compatibility

The 750mAh capacity at 3.7V is the single specification that decides whether this is the correct replacement; it must match the original battery's rating exactly. If your handset's original cell shows different values, this pack will not be suitable regardless of model name.

How it compares

Measured against everything we stock in Household Batteries & Chargers, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 60% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameSiemens
Product typeBatteries
Power
Battery typeLithium
Battery capacity750 mAh
Battery voltage rating3.7
In the box
Battery pack size1-pack

Questions about this item

When will the 750mAh 3.7V lithium cell need replacing?

Replace the battery when it no longer holds enough charge for daily use; the 750mAh capacity and 2.78Wh rating will gradually diminish over repeated charge cycles.

What stops the battery first during continuous operation?

The 750mAh capacity is the limiting factor; once the stored 2.78Wh is depleted the phone will shut down until recharged.

Does the pack get hot or draw extra power when the handset runs all day?

The lithium cell includes overcharge, over-discharge, over-voltage and short-circuit protection, so it maintains normal temperature and power draw during extended use.

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