Sponsored

Charge or disconnect BATTERY

K Myers

Well-Known Member
Joined
Jan 3, 2022
Threads
12
Messages
98
Reaction score
41
Location
Ft myers Fl
First Name
Maurice
Vehicle(s)
2015 GT Mustang
I going Tobe gone for about 90 -120 days should I disconnect the battery or put a charger on it
Sponsored

 

Stangalang

Well-Known Member
Joined
Sep 25, 2023
Threads
9
Messages
95
Reaction score
49
Location
WNY
Vehicle(s)
22' GT Altas Blue
Battery maintainer is more than enough. I've been gone for 2 weeks at a time, and forgotten to put it on a tender. The car still started up after coming back from vacation.
 

Vicr

Well-Known Member
Joined
Mar 8, 2018
Threads
47
Messages
524
Reaction score
338
Location
Fortuna Foothills, AZ
First Name
Vic
Vehicle(s)
2015 Mustang Ecoboost Premium
Make sure battery is at full charge (12.8v) and disconnect the negative battery cable and call it good. I leave my Mustang in the summer this way while I travel for 10 to 12 weeks.
 

Skye

Well-Known Member
Joined
Jan 18, 2022
Threads
12
Messages
1,714
Reaction score
2,428
Location
≈39N
Vehicle(s)
"Skye" Mach1 N2144
Short-term, 90-120 days, I'd think disconnected would be OK. Batteries sit in inventory for as long before being sold.

Long-term, over the life of the car, I'd prefer the use of a tender. Aside from keeping it topped up, it will condition the battery for an optimum service life.

Just in-case, will someone be checking in on the home and car while out? If not, I'd disconnect. I trust my tender, but when I leave long-term, I turn off the water, turn on the heater (if leaning into the Fall) and remove other risks along the way.
 
Last edited:

Sponsored

blackk3389

Well-Known Member
Joined
Jul 15, 2019
Threads
21
Messages
258
Reaction score
165
Location
port st lucie, florida
First Name
WILL
Vehicle(s)
'19 BULLITT#3389, '03 cobra vert#2198,2023 F150
Vehicle Showcase
1
I have had battery maintainers crap on me, yes it was 3 year old unit. for that long of storage i would top off the battery and disconnect.
 

Torched10

Well-Known Member
Joined
May 15, 2019
Threads
100
Messages
1,058
Reaction score
401
Location
Atlanta
First Name
Bob
Vehicle(s)
2019 gt premium convertible. 2017 caddy xts vsport twin turbo.2011 caddy ext
I'm on the side of safety. Many tenders have automatic shut off when charge is full.down side if it not attended to battery could overcharge and possible ignite .safer to just charge it up to 12.6 v unplug black terminal. If the battery is low when you return just charge e it up again also j agree if there's no one home turn off water at street turn off water heater gas if you can.if you have gas dryer turn that off too.good luck
 

Balr14

Well-Known Member
Joined
Jul 31, 2019
Threads
30
Messages
2,556
Reaction score
2,356
Location
SE Wisconsin
First Name
John
Vehicle(s)
BMW Z4 M40i
Mustangs have an excellent hibernation mode and extremely low parasitic power loss. I let mine sit for about 2 months with no issues. 90 - 120 days may be pushing your luck.
 

Ben James

Well-Known Member
Joined
Oct 19, 2018
Threads
0
Messages
83
Reaction score
91
Location
Queensland, Australia
First Name
Ben
Vehicle(s)
2018 S550 Mustang GT
For reference, when I replaced my battery with a lithium unit I was able to calculate the parasitic loss over a 2 week period (double locked).

From memory it worked out to be about 10 ampere hours per day.

The battery we were testing it holds 24000Ah so we estimated it would be able to sit for about a year before we would have to make sure enough charge was left to start the battery.

In the real world things tend to be a little different (for eg parasitic losses in the battery due to temperature changes), but we figured it should be able to sit for at least 2-3 months without any issues.

Im not sure how a regular battery would do though…
 

Aless_andro00

Active Member
Joined
Jan 24, 2024
Threads
0
Messages
27
Reaction score
15
Location
Milan
First Name
Alessandro
Vehicle(s)
2017 Ford Mustang
If you can't use a charger or don't have a plug nearby, it's a good idea to unplug the battery. But, make sure to look at your car's guidebook to do it the right way.
 

Sponsored

nicksalvadore24

Well-Known Member
Joined
Aug 27, 2022
Threads
3
Messages
48
Reaction score
54
Location
Boston, MA
First Name
Nick
Vehicle(s)
2020 Mustang GT Premium PP1
I use the Noco Genius 1 trickle charger. Good little charger that does what it needs to for $30
 

Scuba

Well-Known Member
Joined
Feb 2, 2019
Threads
1
Messages
78
Reaction score
138
Location
Kansas City
First Name
Steve
Vehicle(s)
2018 Mustang GT
Vehicle Showcase
1
I going Tobe gone for about 90 -120 days should I disconnect the battery or put a charger on it
I use the smallest Battery Tender (750ma) when I park it for the winter. Not sure if this is a better choice over disconnect, but I figure the low charge rate has less risk.
The longest stretch I've had it connected is ~30 days, no issues- disconnect may be a better choice for 90+ days.

Still has the original battery (5+years old) and so far no sign of it getting weak. I wonder how much longer it will last....
 

Qcman17

Well-Known Member
Joined
May 14, 2019
Threads
5
Messages
1,060
Reaction score
2,924
Location
Ottawa, Canada
First Name
Cam
Vehicle(s)
2019 Mustang GT A10 Velocity Blue 301A
I use the smallest Battery Tender (750ma) when I park it for the winter. Not sure if this is a better choice over disconnect, but I figure the low charge rate has less risk.
The longest stretch I've had it connected is ~30 days, no issues- disconnect may be a better choice for 90+ days.

Still has the original battery (5+years old) and so far no sign of it getting weak. I wonder how much longer it will last....
I use the same tender and I'm getting on 5 years with the OEM battery with no issues..........so far. :) I also used the same unit for over 6 years on my Camaro SS and never changed the OEM battery before selling it.
 

Link6677

New Member
Joined
Jan 31, 2023
Threads
0
Messages
1
Reaction score
0
Location
FL
First Name
Phil
Vehicle(s)
2023 Mach1 6sp
I leave for 10-45 days regularly and have used a battery tender on my 21014 GT and my 2023 Mach1 with no issues. Prior to getting the tender the 2014 would be dead after 35-40 days.
 

Schuvwj

Active Member
Joined
Jan 12, 2023
Threads
3
Messages
42
Reaction score
16
Location
Florida
First Name
William
Vehicle(s)
2016 GT Roush Supercharged
I’m surprised nobody has offered both!
Disconnect the battery and put the battery tender on the battery!
Sponsored

 
 




Top