Racing Transponder Battery Service

Looking for MyLaps & AMB TranX transponder repair? – we are now replacing batteries in the TranX 160/260/MX “Classic” and the old style case that has the four screws. Older style TranX260 transponders batteries can also be replaced, if they use a 3-cell pack we have that covered. We started doing this out of a basic need in our kart club for repairing our rental transponders, and from there it was opened up to others. If you have a transponder that needs repair, please follow the steps on the repair form below or just contact us. If we can’t repair your transponder, we will return it at no charge. (It will be tested prior to repairs)

We now use a CNC process to make faster repairs on the “Classic” style case.  The grey/black cap is fully removed and in some cases it may show slight tool marks, usually the repairs will look as good as when you sent it in.  On the top of the transponder we use the CNC with an end mill about the thickness of your fingernail, color matched epoxy helps hide this small groove once we are done.  Overall this helps us make faster repairs, we leave your transponder intact and no longer need to remove it from the case.  A new battery is cycled, tested, and then placed into the transponder.  We let the transponder fully charge, check the voltage and signal strength and once we are happy we close it all up.

Pay after repairs, not before!  We keep you in the loop during the repair process, from arrival through various stages of repair, and ship it back with USPS tracking numbers provided. You will find your transponder wrapped in a quick care guide that explains the model type you have, along with a second warranty sheet with finer details, and a sticker for your charger with our contact info.

Battery Replacement – starting at $55.00  (return shipping included)

If you transponder is not staying charged or does not work for a whole event, it might be time to replace the battery. TranX style transponders will blink, and this helps you determine how many days of charge it has roughly remaining.  An old or failing battery may show the correct blink codes for a few hours and then turn off (or a few seconds if the battery is far gone). We will test how well your transponder is still charging the battery on a test rig, along with the rate at which it runs while blasting a signal.  Compared to our database of repairs, this has helped us establish a solid average for how the different internal revisions run. If something is off you will be notified, sometimes we have creative fixes that work to restore the transponder without the need to go after broken bits. Thankfully it is rare!

We use high quality Japanese batteries, we warranty the battery replacement for one year.

Generally return times are around 2-weeks in the US (usually much less, sometimes it only takes 2-days for the actual repair). If you need rush processing and faster shipping please let us know in advance. Normally, we like to take our time and check it all out first!

Important: With USPS shipping they do not like anything that is transmitting a signal, so you will either need to make sure the battery is discharged or ship it in wrapped in aluminum foil.

Contact us if you would like to inquire about a club/group discount, the more you send in the better the pricing. We started repairing our club transponders, and we realize when a large amount of transponders need repairs it can break the budget. Our local track had to repair 18 at once for example (over $5k at the time, even more today).

Payments are processed using either a credit card (via Stripe) or PayPal.  Or check our eBay listings if you prefer that system.

Visit our main website for more information, you can also find the repair form to get everything started here.

Ask your track if they have tried using – it is a great alternative to other tablet/phone scoring apps, and with no added costs!

Repair Gallery

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Contact Us

You can contact us by calling or txt to 210-504-8697.

Via email using this form: Contact Us

Or with our automated repair form/address info.

eBay Transponder short listings

For a full listing of racing transponders on eBay see this page.


AMB tranx 260 hard wire transponder

$450.00 (1 Bid)
End Date: Sunday Jul-23-2017 19:37:32 PDT
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AMB/MY LAPS TranX 260 rechargeable transponder no subscription needed!!

End Date: Wednesday Aug-9-2017 17:00:00 PDT
Buy It Now for only: $550.00
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AMB MYLAPS Transponder TranX 260

$400.00 (0 Bids)
End Date: Friday Jul-28-2017 21:50:58 PDT
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AMB Transponder

$177.50 (11 Bids)
End Date: Sunday Jul-23-2017 7:00:49 PDT
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My Laps AMB–260 Transponder (No Subscription Required) Lifetime Mylaps AMB 260x

End Date: Monday Aug-7-2017 6:32:44 PDT
Buy It Now for only: $520.00
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MRT Transponder Works With AMB And Some Mylaps Systems

End Date: Thursday Jul-27-2017 13:23:56 PDT
Buy It Now for only: $59.99
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