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Small rectangular lithium battery pack with smooth grey finish and wire connector visible

Estry

Estry TL7800 240mAh 3.7V standard battery

SKU CH-ATGQ-KHK61 MPN TL7800

Lithium replacement battery delivering 240 mAh at 3.7 V for AT&T cordless handsets including the TL7800, TL7810 and TL7912 series

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeLithium
  • Battery Capacity240mAh
  • Battery Voltage3.7
  • Direct replacement for AT&T cordless phones
  • 240mAh lithium cell delivers 3.7V power
  • Compact 36.62 x 26.7 x 7.6mm form factor
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS
  • Built-in overcharge, over-discharge and short-circuit protection

Replacement battery for AT&T cordless phones

The Estry TL7800 is a lithium replacement cell rated at 3.7 volts and 240mAh, matching the original specifications for AT&T handsets such as the TL7800, TL7810 and TL7812 series. It is intended for owners who need a direct drop-in when the factory pack no longer holds a charge.

Compact pack with built-in protection circuitry

Measuring 36.62 by 26.7 by 7.6 millimetres and weighing 31.0 grams, the single-cell pack fits the existing battery compartment without modification. Integrated overcharge, over-discharge, over-voltage and short-circuit protection helps maintain safe operation during daily charging cycles.

Certified single unit ready for immediate use

The battery carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications confirming quality and material safety. Supplied as a one-pack with part number BT291665, it requires no additional accessories or software to restore talk time on compatible handsets.

Highlights

  • Direct replacement for AT&T cordless phones
  • 240mAh lithium cell delivers 3.7V power
  • Compact 36.62 x 26.7 x 7.6mm form factor
  • Certified to ISO9001, RoHS, CE, UN38.3 and MSDS
  • Built-in overcharge, over-discharge and short-circuit protection

Specifications

BrandAT&T
TypeBatteries
Battery Pack1-pack
Battery TypeLithium
Battery Capacity240mAh
Battery Voltage3.7

Questions about this item

What devices does the TL7800 3.7V battery replace?

It replaces AT&T models TL7800, TL-7800, SB3014, TL-7812, TL-7810, TL7810, TL7812, TL-7912, TL-7910, TL7910, TL7912 and part number BT291665.

Will the 36.62 x 26.7 x 7.6mm pack fit my handset?

The pack measures 36.62 by 26.7 by 7.6 millimetres and weighs 31.0 grams; compare those dimensions with the compartment in your phone before ordering.

How do I install the lithium pack without damaging the connector?

Power off the phone, remove the old pack, align the plug with the socket and press straight in until it clicks — forcing it at an angle bends the pins.

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