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dunc

Member Since: 31 Dec 2015
Location: surrey
Posts: 132

2016 Defender 90 Puma 2.2 XS CSW Corris Grey

2015 Defender - Battery tender required?

I'm often away for extended periods - up to eight weeks at a time. I have found many cars require hooking up to a battery charger/tender to avoid the battery going flat if left for a few weeks. What is the Defender like in this regard? Anyone use or recommend using a battery charger?

1st Mar 2016 10:36am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

have look at this

http://www.defender2.net/forum/topic42250....p;start=15

1st Mar 2016 10:47am

discomog

Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2528

2015 Defender 90 Puma 2.2 XS CSW Santorini Black

I use a Ctek MXS 5.0 charger/conditioner. I connect via the 13 pin towing socket. I don't tend to leave the Defender stood for a long time but I have one connected to a Morgan Plus 8 which spends most of the winter laid up and starts up first time. I also use one for a John Deere tractor as well and again never a problem with flat batteries. I can thoroughly recommend them, much more convenient (and compact) than a trickle charger. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8

1st Mar 2016 11:04am

jeffersj

Member Since: 23 Jan 2015
Location: Near Preston
Posts: 431

1996 Defender 90 300 Tdi HT Bronze Green

I second the above statement, if you go for Check also get the "Comfort' (think that is its name) connector so you can have it permanently attached to the vehicle so you do not have to remove seat box covers etc.

Jeff
Ex 1968 Series 2A
Ex 90 TD5
Ex D3
Ex D4

1st Mar 2016 11:11am

dunc

Member Since: 31 Dec 2015
Location: surrey
Posts: 132

Thanks for you comments/recommendations.

Just to confirm - do you all think it is necessary to keep the battery on the Defender on charge if left for extended periods?

1st Mar 2016 11:35am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

good quality battery charger will float charge as part of it fauchon i.e. Ctek

solar panel charger is good option for float charging

1st Mar 2016 11:51am

discomog

Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2528

Float charging (ie Ctek for example) rather than trickle charging is preferable if you intend to leave the charger connected for long periods. I have not experienced any problems or seen any reduction in battery life since starting to use this type of charger. It will also recondition your battery as and when required. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8

1st Mar 2016 12:09pm

Cupboard

Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971

2011 Defender 110 Puma 2.4 HT Corris Grey

Whether you need one depends on what sort of other loads you've got on the battery. Split charge relay, Ultra Gauge, tracker will all use about 20mA each constantly, so that's 60mA total. 60*24=1.5Ah/day, 10Ah/week etc. which will flatten your battery in 8 weeks by themselves.

If you haven't got any of the above and just have the factory alarm going, I don't actually know how much that uses but the general consensus suggests about 30mA or 5Ah per week. Over 8 weeks that's 40Ah or about half your battery capacity. It might start, probably will assuming that's the only load and it's a decent battery.

I think I'd be putting a trickle charger on just for peace of mind.

1st Mar 2016 1:40pm

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