Educator ET-300TS Transmitter Compatible Battery 3.7V 400mAh
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Educator ET-300TS Transmitter Compatible Battery 3.7V 400mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
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.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ 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.
Educator ET-300TS Transmitter Compatible Battery 3.7V 400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
400mAh
Educator ET-300TS Transmitter — 3.7V Li-Polymer Replacement Battery (PL-762229)
This 3.7V, 400mAh lithium-polymer battery replaces the internal cell in the Educator ET-300TS Transmitter and related ET-300 series handheld remotes. It fits the transmitter unit — not the collar receiver. The transmitter is the handheld controller used to send signals to the dog training collar.
- ET-300 transmitter series fit: The ET-300TS, ET-300, ET-302, ET-300-L, and additional variants in this family share the same compact transmitter housing, connector pinout, and 3.7V power rail — which is why a single cell covers the group.
- Bench tested on actual hardware: We cycled this cell through the transmitter's BMS and confirmed stable charge acceptance, correct cutoff at low voltage, and no fault flags during charge or discharge.
- First power-on after installation: After fitting this battery, hold the transmitter power button for a full 3–5 seconds — a short press may not register until the BMS completes its initialisation sequence following a full power interruption.
Why the ET-300TS transmitter shows a full charge but cuts out during use
A lithium-polymer cell that has been over-discharged loses the ability to hold voltage under load even after showing a full charge on the indicator. The transmitter's voltage rail drops the moment RF transmission fires, and a degraded cell can't sustain that draw. The BMS then trips a cutoff to protect the cell, which looks like a sudden shutdown. Replacing the cell restores stable voltage delivery during active transmission.
Transmitter not pairing with the collar after battery replacement
Removing the battery clears the transmitter's working memory, which can drop the active pairing session with the receiver collar. This is not a fault with the new battery — it is a standard behaviour after power interruption. Power on both the transmitter and collar, then follow Educator's re-pairing sequence: hold the transmitter's Nick button while powering on the collar until the LED confirms link. The pairing signal operates at the collar's receiver end, not inside the transmitter battery circuit.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Educator
- 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 transmitter powers on but the collar isn't responding after I swapped the battery — what's wrong?
Replacing the battery clears the transmitter's session state, which drops the active link to the collar receiver. This is a pairing loss, not a hardware fault. Power on both units, then run Educator's re-pairing sequence — hold the Nick button on the transmitter while powering on the collar until the collar LED confirms the link. No signal change after that step means the collar itself needs a separate reset cycle per the ET-300 manual.
The new battery charges to full but the transmitter shuts off the moment I press a button — why?
That shutdown pattern points to a voltage sag under load, not a charging problem. Every button press on the ET-300TS fires an RF transmission burst that pulls a short, sharp current draw. If the cell voltage drops below the BMS cutoff threshold during that burst, the unit shuts off even though the resting voltage looked fine. Confirm the battery is fully charged to 4.2V before testing, and if the fault repeats, check that the battery connector is fully seated — a loose contact adds resistance that amplifies sag.
My transmitter battery drains much faster now than it used to — is 400mAh correct for this unit?
Yes, 400mAh is the correct rated capacity for the ET-300TS transmitter cell. Fast drain on a new cell usually traces to one of two causes: the battery shipped partially discharged and hasn't completed a full first charge cycle, or the transmitter is left powered on between sessions. The ET-300TS transmitter draws a standby current even when idle. Charge fully until the indicator clears, then power the transmitter off completely between training sessions rather than leaving it in standby.
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