# Put an alt. in the FC, now battery keeps dying.

**URL:** <https://forums.speedlife.net/t/put-an-alt-in-the-fc-now-battery-keeps-dying/42098>\
**Category:** NYSpeed Automotive\
**Created:** [January 18, 2008, 10:20pm UTC](https://forums.speedlife.net/t/put-an-alt-in-the-fc-now-battery-keeps-dying/42098 "2008-01-18T22:20:38Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![psychopjv](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/psychopjv/32/7251_2.png) [@psychopjv](https://forums.speedlife.net/u/psychopjv)\
**Post date:** [January 19, 2008, 12:15am UTC](https://forums.speedlife.net/t/put-an-alt-in-the-fc-now-battery-keeps-dying/42098/11 "2008-01-19T00:15:05Z")

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> [@91MR2](#):
>
> Skrapper it is a NAPA batt.
> 
> Nitro, it dies after being OFF for several hours, when running it’s absolutely fine.

got a voltmeter? pop it on the battery with the car running. should read between 13.5-14.5 if the alterhater is doing it’s job. If that is all good, shut the ship down and then put the voltmeter on the battery. after running it shouldn’t be lower than 9.7 volts if it’s to maintain the cpu upkeep.

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