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Rectangular lithium battery pack, 49.5 by 33.85 by 4.7 mm, 85.0 g, blue wrapper with white label

Estry

Estry W78H 900mAh 3.7V standard battery

SKU CH-JPY1-497XJ MPN W78H

Lithium replacement cell delivers 900 mAh at 3.7 V for compatible W53, W73 and W78 series devices

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeLithium
  • Battery Capacity900mAh
  • Battery Voltage3.7
  • Replaces original battery precisely
  • Built to exact OEM specifications
  • Multiple safety protections included
  • Certified to ISO9001, RoHS, CE, UN38.3, MSDS
  • Fits W78H, W73H, W73, W73P, W53h, W53P, W53

Compatible replacement battery

The Estry W78H is a 900mAh 3.7V lithium battery built to match the original specifications for models including W78H, W73H, W73, W73P, W53h, W53P and W53. It carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications and includes overcharge, over-discharge, over-voltage and short-circuit protection. Supplied as a single pack weighing 85.0g.

Check model and part number before ordering

Verify that your device uses one of the listed compatible models or the part numbers W53-BATT, YLLP523446C1010CTM or YLLP463346C800CLS. The battery measures 49.5 x 33.85 x 4.7mm so confirm the compartment can accept those dimensions. Ensure the connector and polarity match the original pack.

Thermals, noise and power draw

Lithium chemistry operates silently with no moving parts and generates minimal heat during normal charge and discharge cycles. Rated capacity is 900mAh at 3.7V, giving 3.33Wh of energy storage. Built-in protection circuits limit current and voltage to keep temperatures stable under typical loads.

Highlights

  • Replaces original battery precisely
  • Built to exact OEM specifications
  • Multiple safety protections included
  • Certified to ISO9001, RoHS, CE, UN38.3, MSDS
  • Fits W78H, W73H, W73, W73P, W53h, W53P, W53

Specifications

TypeBatteries
Battery Pack1-pack
Battery TypeLithium
Battery Capacity900mAh
Battery Voltage3.7

Questions about this item

Does the W78H battery come with any installation tools or must they be purchased separately?

The pack contains only the 900 mAh 3.7 V lithium cell; no tools or accessories are included.

My handset uses part number YLLP523446C1010CTM — is this the correct replacement?

Yes, the cell matches that part number and the listed compatible models W78H, W73H, W73, W73P, W53h, W53P and W53.

What does the 3.33 Wh rating tell me about actual runtime in a W53 handset?

It equals 900 mAh at 3.7 V; real talk time depends on the handset power draw, but the capacity is the same as the original W53-BATT cell.

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