We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular Ni-MH battery pack, green shrink wrap with white label, 58 by 20 by 10 millimetres

Estry

Estry Ni-MH 300mAh 4.8V Standard Battery

SKU CH-MZRJ-5ZHGC

Ni-MH 300 mAh 4.8 V replacement pack fits DT Systems H2O 1810 1812 1813 1820 1822 1823 1830 1832 1833 1850 1852 1853 models

  • Specifications4.8
  • Battery Pack1 Year
  • Replaces original DT Systems packs across 18 models
  • Ni-MH chemistry delivers 300mAh capacity at 4.8V
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • Certified to ISO 9001, RoHS, CE, UN 38.3 and MSDS standards
  • Compact 58.24 x 20.59 x 10.63 mm design weighs 53.7 g

Direct Replacement for DT Systems Collars

This Estry Ni-MH pack replaces the original battery in DT Systems BTB, EZT and H2O trainer collars. It delivers 4.8V and 300mAh in the same 58.24 x 20.59 x 10.63mm form factor. The 1.44Wh cell weighs 53.7g and fits the existing compartment without modification.

Steady Output During Long Training Sessions

The nickel-metal-hydride chemistry maintains a consistent voltage curve under the continuous low-current draw typical of e-collar receivers. Built-in overcharge, over-discharge, over-voltage and short-circuit protection prevents cell damage when the collar is left on the charger overnight or stored between seasons.

Simple Two-Wire Swap With Polarity Check

Installation requires only a small screwdriver to open the receiver housing and disconnect the original two-wire connector. The most common issue is reversing the red and black leads; verify polarity against the old pack before soldering or crimping the new connector.

Highlights

  • Replaces original DT Systems packs across 18 models
  • Ni-MH chemistry delivers 300mAh capacity at 4.8V
  • Built-in protection guards against overcharge, over-discharge and short circuits
  • Certified to ISO 9001, RoHS, CE, UN 38.3 and MSDS standards
  • Compact 58.24 x 20.59 x 10.63 mm design weighs 53.7 g

Specifications

BrandNi-MH
Model300mAh
Specifications4.8
Battery Pack1 Year

Questions about this item

Does the 4.8V 300mAh Ni-MH pack run hot during all-day use?

Ni-MH chemistry at 4.8V and 300mAh produces minimal heat; normal operation stays barely warm to the touch.

Must I already own a DT Systems collar such as the H2O 1830 or H2O 1820 for this pack to fit?

Yes, it replaces the original pack in models including H2O 1830, H2O 1820, H2O 1810 and H2O 1852.

Will the 58.24 x 20.59 x 10.63 mm dimensions match the battery bay on my older H2O 1812 unit?

The pack is built to the original specifications, so it fits the H2O 1812 bay exactly.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.