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Rectangular silver lithium-ion battery, 64.85 by 42.15 by 4.7 millimetres, labelled 3.7 volts 1200 milliampere-hours

Estry

Estry X925 1200mAh 3.7V Li-ion battery for Telstra X925 U862 R750

SKU CH-EK5F-HAYE0 MPN X925

Replacement lithium-ion cell rated 1200mAh at 3.7V for Telstra X925, U862 and R750 handsets

  • Battery pack size1-pack
  • Battery typeLithium
  • Battery capacity1,200 mAh
  • Battery voltage rating3.7
  • Product typeBatteries
  • 1200mAh capacity powers the Telstra X925 U862 R750 through a full day
  • 7V lithium cell matches the original Li3711T42P3h654246 specification exactly
  • Built-in overcharge, over-discharge, over-voltage and short-circuit protection extends safe service life
  • Compact 64.85 x 42.15 x 4.7mm form factor fits the handset without modification
  • Certified to ISO9001, RoHS, CE and UN38.3 standards for quality and safety

Direct Replacement Battery

The Estry X925 is a 1200mAh lithium-ion pack built to the original specifications for Telstra X925, U862 and R750 handsets. It delivers 3.7V nominal voltage and 4.44Wh energy in a single-cell format. Certified to ISO9001, RoHS, CE, UN38.3 and MSDS standards. The pack measures 64.85 x 42.15 x 4.7mm and weighs 50.0g.

Low-Draw Thermal Profile

In normal phone operation the cell runs cool and silent because it has no moving parts. Internal protection circuitry guards against overcharge, over-discharge, over-voltage and short-circuit events without adding audible noise. Power draw follows the handset’s modem and display load, typically staying well within the 1200mAh capacity envelope for daily use.

Sustained Load Behaviour

During prolonged calls or data sessions the battery maintains stable voltage until the protection circuit triggers a controlled shutdown at the safe lower limit. No thermal throttling occurs because the chemistry is rated for continuous discharge within the handset’s design envelope. Buyers needing higher capacity or a different form factor should look elsewhere.

How it compares

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

Price $8.99
Cheaper than about 80% of the 10,440 comparable items (median $10.99).

Specifications

Product
Brand nameTelstra
Product typeBatteries
Power
Battery typeLithium
Battery capacity1,200 mAh
Battery voltage rating3.7
In the box
Battery pack size1-pack

Questions about this item

How do I install the battery in my Telstra X925, and which orientation step is often missed?

Power off the phone, remove the rear cover, align the three gold contacts on the 64.85 x 42.15 x 4.7 mm pack with the terminals in the compartment, press firmly until it clicks, then replace the cover — skipping the contact alignment causes a no-boot condition.

What maintenance or replacement will this 1200mAh 3.7V pack need over time?

Lithium-ion cells lose capacity with each charge cycle; when runtime drops noticeably below the rated 4.44 Wh, replace the pack with another Estry X925 unit matching part numbers Li3711T42P3h654246 or Li3715T42P3H654251.

What limit appears first during sustained heavy use of this battery?

The integrated protection circuit triggers over-current or over-temperature shutdown before the 1200 mAh capacity is fully drained, pausing output until the cell cools or the load decreases.

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