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DT Systems EDT Replacement Battery 4.8V 300mAh Ni-MH

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From $23.99 USD $29.99
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Fits DT Systems EDT training collar and 16+ compatible models including EZT and ST remote receivers.
4.8V at 300mAh delivers sufficient charge cycles for typical training sessions without midday recharge needs.
Cylindrical Ni-MH cell slides into the battery bay with flat negative contact and retention clip lock.
We bench-tested the cell under load cycle simulation; BMS accepts the charge profile without cutoff faults on first insertion.
After battery installation, take the dog outside for 5–10 minutes before first training use — the collar's RF circuitry performs a cold startup that requires outdoor signal acquisition.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

4.8V

Amp

300mAh

DT Systems EDT / EZT / ST / RH Series — 4.8V Ni-MH Replacement Battery

This is a 4.8V, 300mAh Ni-MH replacement battery for DT Systems remote dog training collars. It fits the EDT, EZT, ST, and RH series, plus 14 additional DT Systems collar models. Swap it in when the original pack no longer holds a charge through a full training session.

  • EDT / EZT / ST / RH platform compatibility: These collar models share the same 4.8V Ni-MH cell configuration, connector pinout, and charge management circuit. That common architecture is why one battery covers all of them — the receiver circuitry expects the same voltage rail across the range.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on a DT Systems receiver. The onboard charge circuit accepted the pack without fault, and cell voltage held within spec across multiple cycles with no BMS interruption.
  • Ni-MH conditioning on DT Systems collars: DT Systems collar chargers use a trickle-charge profile tuned for Ni-MH chemistry. Do not leave the collar on the charger for more than the time specified in your model's manual — Ni-MH cells develop voltage depression faster than other chemistries when overcharged on trickle.

Why the collar stimulus stops firing mid-session after a battery swap

Ni-MH cells deliver a flatter discharge curve than alkaline, but they drop off sharply once capacity is exhausted. If the collar cuts out during active use shortly after a swap, the new pack may not have received a full initial charge. DT Systems chargers need a complete charge cycle — partial charges on a fresh Ni-MH pack leave less usable capacity than the rated 300mAh. Connect the collar to the charger until the indicator confirms a full charge before the next session.

Collar not responding to the transmitter after installing the new battery

A power interruption clears the active pairing state on many DT Systems receivers. After fitting the new battery, the collar and transmitter may need to re-link. Hold the transmitter's power button until the LED blinks, then press the collar's power button to re-enter pairing mode — the exact sequence varies by model, so check your manual. If the collar still won't respond, verify the pack is seated fully and the terminal contacts are clean, then confirm pack voltage is at or above 4.5V with a multimeter before re-pairing.

Compatible Models

EDT EZT ST RH BTB H20 H2O 1810 H2O 1812 H2O 1813 H2O 1820 H2O 1822 H2O 1823 H2O 1830 H2O 1832 H2O 1833 H2O 1850 H2O 1852 H2O 1853

Technical Specifications

Voltage4.8V
Amp Hours300mAh
Capacity300mAh
Rate1.44Wh
Net Weight28.7g /1.01 oz
Gross Weight53.7g /1.89 oz
Approximate Weight53.7g /1.89 oz
Dimension 58.24 x 20.59 x 10.63mm

Product Highlights

  • Brand: DT Systems
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The collar worked fine before I swapped the battery — now it gives a weaker stimulus than it used to. What changed?

A partially charged Ni-MH pack delivers lower terminal voltage under load, which reduces output intensity on DT Systems receivers. The stimulus circuit scales with available voltage, so a pack sitting at 4.2V instead of a full 4.8V will feel noticeably weaker. Charge the new battery completely before testing — Ni-MH cells need a full first cycle to reach rated capacity. Recheck stimulus strength after a complete charge and the difference should disappear.

The new battery drains much faster than the old one did when it was new. Is that normal?

Fresh Ni-MH cells sometimes deliver below-rated capacity for the first two or three charge-discharge cycles — this is normal for the chemistry, not a defect. Run two or three full charge and full discharge cycles before judging the pack's real capacity. If drain is still noticeably fast after conditioning, check whether the collar is set to a high-stimulation mode or continuous beep, which pulls significantly more current than standby. Measure resting voltage after a full charge — it should read at or above 4.7V; anything lower points to a cell issue.

The charger indicator shows a full charge but the collar won't power on at all after the battery swap.

This usually means the pack isn't making solid contact with the collar's terminals. Remove the battery, inspect the contact pads for corrosion or debris, and reseat the pack firmly. If contact looks clean, measure pack voltage directly with a multimeter — a healthy fully charged Ni-MH pack at 4.8V nominal should read between 4.7V and 5.0V. A reading below 4.5V means the charger didn't complete a real charge cycle; reconnect and allow a full uninterrupted charge before testing again.

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