Stanley 100A FatMax BC100BF Battery Charger & Maintainer $59.99 + Free Shipping

alimda

Sep 16, 2026 2:35 PM

681 Comments

Joined Jun 2016

alimdaSep 16, 2026 2:35 PM

681 Comments

Can this charge fully drained car battery?

fef

Sep 16, 2026 2:53 PM

21 Comments

Joined Jul 2015

fefSep 16, 2026 2:53 PM

21 Comments

Quote from alimda

:

Can this charge fully drained car battery?

Yes it can. It may take a day

1

alimda

Sep 16, 2026 3:07 PM

681 Comments

Joined Jun 2016

alimdaSep 16, 2026 3:07 PM

681 Comments

Quote from fef

:

Yes it can. It may take a day

The reason I was asking is I have another different model that supposed to charge a fully drained car battery, but it gives me an error message every time. Once I put some charge with an old-school Schumacher, then it can pick it up from there. I read somewhere that there is feature that brings the fully drained batteries back to life. I believe Noco ones have that feature. I was wondering whether this Stanley has that feature.

Mighty_Putty

Sep 16, 2026 5:35 PM

116 Comments

Joined Oct 2013

Mighty_PuttySep 16, 2026 5:35 PM

116 Comments

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Quote from fef

:

Yes it can. It may take a day

This was one of the questions posted on HD. The answer:This unit requires a battery to have at least 2V remaining in it to activate all safety features and properly charge the battery. If a battery is completely depleted, it is recommended to have the battery checked at local automotive store to ensure it is working in proper function. If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at [email protected]|Feb 20, 2026

3

1

kbrown210

Sep 16, 2026 7:21 PM

277 Comments

Joined Dec 2016

kbrown210Sep 16, 2026 7:21 PM

277 Comments

Can this bring a Greenworks battery that won't charge and only blinks red when attempting to charge?

MaroonPocket778

Sep 16, 2026 7:22 PM

519 Comments

Joined Nov 2019

MaroonPocket778Sep 16, 2026 7:22 PM

519 Comments

Quote from Mighty_Putty

:

This was one of the questions posted on HD. The answer:This unit requires a battery to have at least 2V remaining in it to activate all safety features and properly charge the battery. If a battery is completely depleted, it is recommended to have the battery checked at local automotive store to ensure it is working in proper function. If further assistance is needed, please contact Baccus Global Technical Support at 877.571.2391 or email at [email protected]|Feb 20, 2026

You can just apply a 12 v ps to it or parallel it and it sh l uld hold enough of a surge face charge temporarily to get your charger to keep it going...

Masejoer

Sep 16, 2026 7:38 PM

3.1K Comments

Joined Jul 2010

MasejoerSep 16, 2026 7:38 PM

3.1K Comments

Quote from alimda

:

The reason I was asking is I have another different model that supposed to charge a fully drained car battery, but it gives me an error message every time. Once I put some charge with an old-school Schumacher, then it can pick it up from there. I read somewhere that there is feature that brings the fully drained batteries back to life. I believe Noco ones have that feature. I was wondering whether this Stanley has that feature.

I'd just temporarily connect it in parallel with another battery to get the charger started, then remove the second battery. Even a couple seconds from a power tool battery will be fine to "jump" start the charging.

That said, a battery drained that far is likely bad. It would have physical changes inside, and likely not be very usable for anything from that point on. One of the most common lead-acid batteries that people see this with is internal combustion yard tools, and it's why a lot of people get only a season or two out of the batteries - once they deeply discharge, they become unusable without assistance from a jump starter.

1

mehrdadkrad

Sep 16, 2026 9:14 PM

129 Comments

Joined Jul 2015

mehrdadkradSep 16, 2026 9:14 PM

129 Comments

Quote from alimda

:

Can this charge fully drained car battery?

if it's not damaged and can take a charge then yes but if it's fully discharged and probably has internal damage then definitely no and be careful because it can sometimes explode

desynergy

Sep 16, 2026 11:25 PM

4.8K Comments

Joined Jul 2012

desynergySep 16, 2026 11:25 PM

4.8K Comments

Edit: No, this does NOT support 24V LifePo4 boat batteries, only 12V.

Last edited by desynergy September 16, 2026 at 04:28 PM.

Maaaark914

Sep 17, 2026 12:03 AM

357 Comments

Joined Apr 2018

Maaaark914Sep 17, 2026 12:03 AM

357 Comments

Quote from alimda

:

The reason I was asking is I have another different model that supposed to charge a fully drained car battery, but it gives me an error message every time. Once I put some charge with an old-school Schumacher, then it can pick it up from there. I read somewhere that there is feature that brings the fully drained batteries back to life. I believe Noco ones have that feature. I was wondering whether this Stanley has that feature.

Try a trickle charge to bring batery to 2-3 amps first

Phixion35

Sep 17, 2026 4:10 AM

472 Comments

Joined Jul 2020

Phixion35Sep 17, 2026 4:10 AM

472 Comments

How is this unit compared to like a Schumacher SC1280 or SC1281? Both of those I'm considering for a charger/maintainer...

TealIdea227

Sep 17, 2026 11:31 AM

1.4K Comments

Joined Sep 2022

TealIdea227Sep 17, 2026 11:31 AM

1.4K Comments

Quote from Phixion35

:

How is this unit compared to like a Schumacher SC1280 or SC1281? Both of those I'm considering for a charger/maintainer...

You're seeing a promotional push on a product that basically only has paid reviews. Most of the Home Depot ones are complaining that it has to be plugged into an outlet.

Who actually makes this unit? Why is Stanley badging a new model now and why did their old models go away? Will there be long-term reviews of this 5 years from now, or will it already be discontinued by then? And most importantly, will the charging algorithm baked into the processor fry my $200 AGM if it gets stuck in a loop?

Beats me. I would advise separating your charging and maintaining duties into different units.

2

Phixion35

Sep 17, 2026 3:05 PM

472 Comments

Joined Jul 2020

Phixion35Sep 17, 2026 3:05 PM

472 Comments

Quote from TealIdea227

:

You're seeing a promotional push on a product that basically only has paid reviews. Most of the Home Depot ones are complaining that it has to be plugged into an outlet.Who actually makes this unit? Why is Stanley badging a new model now and why did their old models go away? Will there be long-term reviews of this 5 years from now, or will it already be discontinued by then? And most importantly, will the charging algorithm baked into the processor fry my $200 AGM if it gets stuck in a loop?Beats me. I would advise separating your charging and maintaining duties into different units.

People complained that it plugs in? Did they not understand what they purchased?

FatMax has been in production for a little while with chargers, I see them at Sam's Club, and the older unit has been out of production to my knowledge for some time. Stanley still has a reputation even if they sell more budget minded tools and items so I wouldn't lump this in with no name junk. That all said, most chargers also maintain as none know if/when you'll remove the battery. Higher voltage for charging, low for maintaining or trickle charge.

TealIdea227

Sep 17, 2026 5:12 PM

1.4K Comments

Joined Sep 2022

TealIdea227Sep 17, 2026 5:12 PM

1.4K Comments

Quote from Phixion35

:

That all said, most chargers also maintain as none know if/when you'll remove the battery. Higher voltage for charging, low for maintaining or trickle charge.

I have a certain perspective on these things that comes from spending thousands on $200 batteries, having family members that need to come home, and having to go get them because AAA declined to show up. I'm sure others may not share it. But I would not pin my hopes and dreams into one single $60 25A charger/maintainer doing double duty with the expectations that nothing could possibly go wrong at the worst time, just because it says FatMax on the label.

1A maintainers aren't hard to find, and they only have the single job of regulating <20W, although you'll pay whatever price you'll pay nowadays (unless you didn't really need one that badly in the first place.)

luddite_cyborg

Pro

Sep 17, 2026 5:34 PM

1K Comments

Joined May 2012

luddite_cyborg

Pro

Sep 17, 2026 5:34 PM

1K Comments

Quote from TealIdea227

:

You're seeing a promotional push on a product that basically only has paid reviews. Most of the Home Depot ones are complaining that it has to be plugged into an outlet.

Who actually makes this unit? Why is Stanley badging a new model now and why did their old models go away? Will there be long-term reviews of this 5 years from now, or will it already be discontinued by then? And most importantly, will the charging algorithm baked into the processor fry my $200 AGM if it gets stuck in a loop?

Beats me. I would advise separating your charging and maintaining duties into different units.

It's not a promo push, it's a clearance/liquidation. Walmart cleared these out at my local store last month for $55

1

Stanley 100A FatMax BC100BF Battery Charger & Maintainer $59.99 + Free Shipping

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