scottmcll
Posts: 5
Joined: Mon Dec 11, 2017 11:15 pm

Re: My bolt is completely dead

Tue Dec 12, 2017 11:01 pm

Oh, I will ABSOLUTELY NOT live with it should this reoccur. They know that I've researched this, with this forum's help (much thanks, again), and that I am aware that this is not an isolated occurrence.

DesertSprings
Posts: 29
Joined: Mon Jun 12, 2017 6:46 pm

Re: My bolt is completely dead

Wed Dec 13, 2017 12:41 am

The 12v battery should absolutely be covered under warranty.

scooter123
Posts: 48
Joined: Wed Aug 16, 2017 1:23 pm

Re: My bolt is completely dead

Sun Sep 09, 2018 6:19 pm

Guess what happened after I left my hazzards on all day.

That wasn't fun. I had to get a jump for about 10 min. A insta-jump would NOT start the car for more than a few seconds.

SparkE
Moderator
Posts: 943
Joined: Sun Sep 11, 2016 5:53 am
Location: SF Bay Area

Re: My bolt is completely dead

Sun Sep 09, 2018 7:36 pm

scooter123 wrote:Guess what happened after I left my hazzards on all day.

That wasn't fun. I had to get a jump for about 10 min. A insta-jump would NOT start the car for more than a few seconds.


I highly recommend plugging your 12V battery in to a smart trickle charger overnight to make sure the accessory battery is fully charged.

BoltMaybe
Posts: 25
Joined: Fri Sep 15, 2017 7:20 pm
Location: Portland, OR

Re: My bolt is completely dead

Fri Sep 14, 2018 8:41 pm

SparkE wrote:
scooter123 wrote:Guess what happened after I left my hazzards on all day.

That wasn't fun. I had to get a jump for about 10 min. A insta-jump would NOT start the car for more than a few seconds.


I highly recommend plugging your 12V battery in to a smart trickle charger overnight to make sure the accessory battery is fully charged.

MAKE SURE YOU USE THE CORRECT TYPE OF CHARGER. The Bolt uses an AGM battery which is different than your typical lead acid flooded cell battery. Most importantly has a special charging curve so be sure to use an AGM trickle charger. Unlike a traditional battery, an AGM does not recover well from a deep discharge (below 50%).

IMHO It is worth investing in one of the high end AGM batteries. there are a bunch of sites with reviews, I used https://mozaw.com/best-agm-battery-chargers/ as a reference.
EV Ownership History
2017 Chevy Bolt Premier
2014 Mercedes B-Class
2011 Nissan LEAF

SparkE
Moderator
Posts: 943
Joined: Sun Sep 11, 2016 5:53 am
Location: SF Bay Area

Re: My bolt is completely dead

Fri Sep 14, 2018 10:01 pm

BoltMaybe wrote:
SparkE wrote:
scooter123 wrote:Guess what happened after I left my hazzards on all day.

That wasn't fun. I had to get a jump for about 10 min. A insta-jump would NOT start the car for more than a few seconds.
I highly recommend plugging your 12V battery in to a smart trickle charger overnight to make sure the accessory battery is fully charged.
MAKE SURE YOU USE THE CORRECT TYPE OF CHARGER. The Bolt uses an AGM battery {...}


Yes, I should have mentioned "AGM Charger" (which is what I have : C-TEK US 0.8). AGM batteries do not like getting charged to over 14.6V or so - regular, "traditional" flooded lead-acid are fine up to about 15V (for short periods - not for days).

My (12V battery trickle) charger will charge at a very low constant amperage (0.8A !!) until battery voltage reaches about 14.4V (Bulk phase), then keeps the battery at a constant 14.4V while slowly dropping the amperage (Absorption phase), then once amps drop close to nil (i.e., complete saturation charge to 100%) it will keep the battery at 13.6V for up to 10 days (Float phase). I connect it and plug it in and forget it until the next day. Note this is basically a 'top-off' trickle charger to use when the battery is over 50-60% full. I have a 12A smart charger that I use when I need to dump more than 10 Ah into the battery (e.g., my idiot son leaves the inside dome light on overnight).

Return to “Technical Discussions”