Chances are it just died of old age, nothing to do with the battery. The IMMU antenna works similar to an RFID reader, and since RFID requires the transmitting device (the car) to broadcast enough electrical power to remotely power the key, there's quite a bit of electric current passing through the antenna driver. In the bad IMMU's I've dissected (probably half a dozen), that was the most common cause of death. I recall only one of them died from a different ailment, a fatigued antenna wire.
Hello; Yes old age is logical. The old battery was cranking the engine over well enough even if a bit weak. I guess since this is the first time in 19 years of a failure I should be happy about that. I have replaced normal wear items over the years but this was the first breakdown. I was also lucky in that the failure happened at my home.VStar650CL wrote: ↑Thu Jan 28, 2021 4:05 pmChances are it just died of old age, nothing to do with the battery. The IMMU antenna works similar to an RFID reader, and since RFID requires the transmitting device (the car) to broadcast enough electrical power to remotely power the key, there's quite a bit of electric current passing through the antenna driver. In the bad IMMU's I've dissected (probably half a dozen), that was the most common cause of death. I recall only one of them died from a different ailment, a fatigued antenna wire.
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