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Rectangular lithium battery pack, flat grey finish, 51.6 by 34.0 by 5.4mm

Estry

Estry standard battery C3 C2 T199369 1000mAh 3.7V

SKU CH-EP3Y-SA4VQ

Lithium replacement cell for C3 and C2 devices, 1000 mAh at 3.7 V with overcharge and short-circuit protection

  • TypeBatteries
  • Battery Pack1-pack
  • Battery TypeLithium
  • Battery Capacity1000mAh
  • Battery Voltage3.7
  • Exact-fit replacement for C3 and C2 models
  • 1000mAh lithium cell delivers 3.7Wh of energy
  • 6 x 34.0 x 5.4mm profile slips into the original bay
  • Built-in overcharge, over-discharge and short-circuit protection
  • Certified to ISO9001, RoHS, CE and UN38.3 standards

Direct replacement for C3 and C2 devices

This Estry lithium battery matches the original T199369 specifications with a 1000mAh capacity at 3.7V. It fits models C3 and C2 and measures 51.6 x 34.0 x 5.4mm with a weight of 44.0g. Built-in protection guards against overcharge, over-discharge, over-voltage and short circuits. Certifications include ISO9001, RoHS, CE, UN38.3 and MSDS.

Steady output during extended use

The cell delivers a consistent 3.7V through the full discharge cycle rather than peaking briefly and sagging. Protection circuits maintain safe limits during continuous draw, preventing the voltage drops that cause unexpected shutdowns. At 3.7Wh the pack supports typical daily cycles without rapid degradation. ISO9001 and UN38.3 compliance confirm the manufacturing quality behind that stability.

Replaces an ageing or swollen original pack

Users whose C3 or C2 device no longer holds a charge or shows physical swelling will restore factory runtime with this drop-in unit. The jump is worth it when the original battery falls below usable capacity or triggers safety warnings. Buyers who need a different form factor, higher capacity or a multi-pack bundle should look elsewhere.

Highlights

  • Exact-fit replacement for C3 and C2 models
  • 1000mAh lithium cell delivers 3.7Wh of energy
  • 6 x 34.0 x 5.4mm profile slips into the original bay
  • Built-in overcharge, over-discharge and short-circuit protection
  • Certified to ISO9001, RoHS, CE and UN38.3 standards

Specifications

TypeBatteries
Battery Pack1-pack
Battery TypeLithium
Battery Capacity1000mAh
Battery Voltage3.7

Questions about this item

Does the 3.7 V lithium cell generate noticeable heat during continuous use?

The 1000 mAh 3.7 V pack is designed to match original specifications and includes overcharge, over-discharge, over-voltage and short-circuit protection to limit heat build-up.

Must I already own a C3 or C2 device with a T199369 battery slot for this pack to work?

Yes — the cell fits only models C3 and C2 that use part number T199369; it measures 51.6 × 34.0 × 5.4 mm and weighs 44.0 g.

Will the replacement cell behave the same as the original battery in my older C3 unit?

It is built to the same 3.7 V, 1000 mAh, 3.7 Wh ratings and carries ISO 9001, RoHS, CE, UN 38.3 and MSDS certification for identical performance.

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