812 Issues with electronic keyless system or battery

I am almost certain that it’s the battery. Get it replaced. The slightest drop in voltage will cause all sorts of gremlins.


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Once you turn on the car with the key, do ensure to wait till most lights are off before starting the engine.

 

it’s the battery typically causing electric issues

 

Ironically, this happened to me a month ago.....had the OEM garbage battery changed to the Interstate MTX-94R/H7....gremlins gone

 

exactly

 

I had similar electrical issues despite fact that 812 GTS had been on on factory battery tender for several months. IT REMAINS under its new car 3 year warranty. Dealer confirmed that battery would not hold charge and replaced the $1600- OEM battery at no charge to me. I was told by my excellent service advisor that battery would not have been replaced under supplemental extended warranty. If I later switch to interstate battery while under extended warranty, would this battery void other warranty coverage??

 

The dealer also sells and installs the Interstate battery, so you're good. This will not void any warranty whatsoever. And, btw, with the extended warranty, my battery has been replaced a few times.

 

If you'd like to look into a Lithium Battery for your 812 Antigravity Batteries would be willing to offer you a discount. Our Antigravity Lithium Battery will keep the voltage much steadier, and a few points higher also, does not suffer the voltage sag as AGM does during loads. Aside from the weightloss which is about 40 lbs, our battery also has Wireless Built-In Jump Starting in the event you ever did accidentally over-discharge the battery, you simply press our provided Wireless Keyfob start the car and drive away. Lastly you should see a significantly longer battery life. For example our battery has a built in Battery Management System that will not allow it to over-discharge and has protections for many aspect such as over-current , over-voltage among other protections, but also Lithium Cells are rated for literally 3x the cycles ( a full discharge and recharge of a battery) of Lead Acid Battery/AGM.... typically rated for about 1000 cycles, lithium rated for 3000 cycles. Let me know if your interested.

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Perhaps a dumb question, but would you still use the Ferrari battery tender on this battery? Thanks.