Battery health: locked or unlocked in driveway

pphilpot · Oct 18th, 2019, 14:04

Hey all - I think that my battery health is failing, and after about two weeks of not using the car, starting is a bit sluggish. Will I save any battery drain by leaving the car unlocked or should I just disconnect the battery when it's likely that I won't use the car for a few weeks?

Thanks in advance.

Paul

JoeNinety · Oct 18th, 2019, 14:50

No, you could, or get it on a proper trickle charger (e.g Ctek)

oragex · Oct 18th, 2019, 22:41

Be aware that having the battery go flat when the car is left for a while, can cause a difficult to fix immobilizer issue from some modules getting their software corrupt.

Use a charger as mentioned above, or simply disconnect the battery - if you have an S60 you can disconnect the positive inside the trunk - the S60 has a trunk lock and you can then use the key to unlock it. On the V70 disconnect rather under the bonnet - the cable is near the right strut tower, under a plastic piece marked with a + sign. Then can unlock drivers door and release the bonnet to access the battery again. When disconnecting the battery, have only the drivers door unlocked, then lock it manually with the key to secure the car.

Upon reconnecting the battery, have the ignition key in POS II to prevent any surge that may affect the temp sensor in the climate module

Oct 18th, 2019, 14:04	#1
pphilpot Premier Member Last Online: Jan 19th, 2024 15:24 Join Date: Oct 2006 Location: Woodbridge, Suffolk	Battery health: locked or unlocked in driveway Hey all - I think that my battery health is failing, and after about two weeks of not using the car, starting is a bit sluggish. Will I save any battery drain by leaving the car unlocked or should I just disconnect the battery when it's likely that I won't use the car for a few weeks? Thanks in advance. Paul __________________ ---------------------------------------------------------------------- Current: 2011 C30 1.6 D2 R-Design (155,000) Previous: 2004 S40 1.9D; 2004 S60 D5; 1996 V40 2.0; 1989 740 2.4 T

Oct 18th, 2019, 14:50	#2
JoeNinety Senior Member Last Online: Yesterday 22:10 Join Date: May 2019 Location: Winchester	No, you could, or get it on a proper trickle charger (e.g Ctek) __________________ V70 P2 2006 2.4 Petrol 170bhp Est SE Automatic (5 speed) MG Midget Mk1 1962 Previous: RR TDV8 3.6 '08; RR TD6 3.0 '02; RR P38A V8 '99; Audi A4 Cab 3.0 V6 2004; Volvo 740 GLE Est 1989 Have VIDA & VXDIAG NANO on W10Pro - happy to help

Oct 18th, 2019, 22:41	#3
oragex Premier Member Last Online: Jul 26th, 2021 21:24 Join Date: Jun 2013 Location: Coldnada	Be aware that having the battery go flat when the car is left for a while, can cause a difficult to fix immobilizer issue from some modules getting their software corrupt. Use a charger as mentioned above, or simply disconnect the battery - if you have an S60 you can disconnect the positive inside the trunk - the S60 has a trunk lock and you can then use the key to unlock it. On the V70 disconnect rather under the bonnet - the cable is near the right strut tower, under a plastic piece marked with a + sign. Then can unlock drivers door and release the bonnet to access the battery again. When disconnecting the battery, have only the drivers door unlocked, then lock it manually with the key to secure the car. Upon reconnecting the battery, have the ignition key in POS II to prevent any surge that may affect the temp sensor in the climate module __________________ Several Volvo Repair Videos https://www.youtube.com/playlist?lis...ECTts0FSVSOT_c

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