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SportDog SR-225 Receiver Compatible Battery 3.7V 160mAh

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Fits SportDog SR-225 receiver collar, replaces OEM part SAC54-13735.
3.7V, 160mAh lithium-polymer cell powers the receiver during training sessions and tracking mode.
Connector slides into the battery slot with flat orientation; no locking tab, seats flush against the PCB.
We tested the pack on a SportDog platform — BMS accepted the cell without fault codes, discharge curve stayed flat through active stimulation cycles.
After installing, take the dog outside for 5–10 minutes to allow the GPS cold start to acquire initial location fix.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

3.7V

Amp

160mAh

SportDog SR-225 / SR-225S / SR-225W Receiver — 3.7V Li-Polymer Replacement Battery (SAC54-13735)

This is a 3.7V, 160mAh lithium-polymer battery for the SportDog SR-225, SR-225S, and SR-225W receiver collars, plus the SportHunter 825 and compatible models. It replaces OEM part SAC54-13735. The SR-225 is a wireless dog training collar receiver — this battery powers the stimulation and tone circuits that respond to the handheld transmitter.

  • SR-225 series and SportHunter 825 compatibility: These models share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol. A single cell at this voltage and physical size — 34.00 × 19.80 × 3.20mm — covers the full receiver lineup without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the SR-225 receiver board. The BMS accepted the cell without error flags, charge termination triggered correctly at full voltage, and stimulation output held consistent across test cycles.
  • Collar reactivation after cell swap: After fitting the new battery, pair the receiver to the transmitter again before field use — the SR-225 loses its link state when power is fully interrupted, and the transmitter will not send stimulus to an unpaired collar.

Why the SR-225 receiver stops responding mid-session after a battery swap

The SR-225 receiver draws a brief current spike each time it executes a stimulation command. A degraded or deeply discharged cell sags below the BMS cutoff threshold during that spike, causing the receiver to shut off even if the resting voltage looks acceptable. A fresh 160mAh cell at full charge maintains voltage above the cutoff during these transient draws. If the collar shuts off during a command after fitting this battery, confirm the cell was charged fully before use — resting voltage should read at or above 4.1V on a multimeter before installation.

Transmitter showing "out of range" when collar is nearby

This symptom appears when the receiver collar has lost its paired state with the transmitter after a power interruption — it is not a range problem. When the SR-225 receiver loses battery power completely, the link registration clears from memory. The transmitter interprets an unpaired collar as out of range rather than unpaired. Re-run the pairing sequence from the transmitter according to the SR-225 manual, with collar and transmitter within one metre of each other, to restore the link.

Compatible Models

SR-225 receiver SR-225S receiver SR-225W receiver SportHunter 825 SD-825 FieldTrainer 425 FieldTrainer 425S SD-425 SD-425S SR-225 SR-225S WetlandHunter 425CAMO SD-425CAMO SR-225W SD-425E receiver SD-825E receiver SDR-AFE receiver SD-425 Camo SD-575 SD-575E SD-875 SD-875E SD-425X SD-425XS SD-425X Camo SD-825X

Replaces Part Numbers

SAC54-13735

Technical Specifications

Voltage3.7V
Amp Hours160mAh
Capacity160mAh
Rate0.59Wh
Net Weight1g /0.04 oz
Gross Weight26g /0.92 oz
Approximate Weight26g /0.92 oz
Dimension 34.00 x 19.80 x 3.20mm

Product Highlights

  • Brand: SportDog
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

The collar worked fine before I changed the battery — now the stimulation button does nothing. What happened?

The SR-225 clears its paired state whenever the receiver loses power completely. The transmitter is sending signals, but the collar is not registered to receive them, so nothing happens. Re-run the pairing sequence with the transmitter and collar within one metre of each other. Once paired, test a low-level stimulation command before heading out.

The new battery drained much faster than the original did when it was new. Is something wrong with the cell?

A 160mAh cell at this size has a fixed energy ceiling — faster drain usually points to increased current draw, not a faulty cell. The SR-225 receiver draws more current when it is actively polling for transmitter signals at high repetition rates or when stimulation commands fire frequently. Check that the transmitter is not set to continuous stimulation mode, which holds the output circuit active and pulls steady current from the receiver cell rather than short bursts.

After fitting the new battery, the collar charges but the indicator light pattern is different from before. Is it still charging correctly?

Charge indicator behaviour on the SR-225 is controlled by the receiver's onboard charge management circuit, not the cell itself. A different light pattern after a cell swap usually means the circuit is running a conditioning cycle on the new cell — this is normal on first charge. Let the collar charge to completion without interrupting it. If the light pattern has not resolved to the standard "charge complete" state after three hours on the cradle, check that the charging contacts on the collar and cradle are clean and making firm contact.

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