martyn Posted November 9, 2020 Report Share Posted November 9, 2020 Quick question, In the event of a battery change, would it be possible to use your c-tech battery charger plugged into the cigar lighter under the armrest to maintain a charge to the car? And would there be any difference by selecting the AGM setting or Recond? No problem at the mo with the battery but it would be good to know for the future! Link to comment Share on other sites More sharing options...
iborguk Posted November 9, 2020 Report Share Posted November 9, 2020 The Ctek MSX 7 has a supply mode to do what you suggest, the 5 does not. If you hit Amazon with a search on Car Memory Saver you will find 20 quid devices which can also do the same job from a donor battery. Link to comment Share on other sites More sharing options...
martyn Posted November 9, 2020 Author Report Share Posted November 9, 2020 43 minutes ago, iborguk said: The Ctek MSX 7 has a supply mode to do what you suggest, the 5 does not. If you hit Amazon with a search on Car Memory Saver you will find 20 quid devices which can also do the same job from a donor battery. Cheers, will have a look! Link to comment Share on other sites More sharing options...
iborguk Posted November 9, 2020 Report Share Posted November 9, 2020 13 minutes ago, martyn said: Cheers, will have a look! For example https://www.amazon.co.uk/Draper-SMS-22277-Socket-Memory/dp/B008H14SH0/ref=sr_1_2?crid=3NZZAQK1JJ65G&dchild=1&keywords=draper+memory+saver&qid=1604947779&sprefix=Draper+memo%2Caps%2C167&sr=8-2 Link to comment Share on other sites More sharing options...
martyn Posted November 9, 2020 Author Report Share Posted November 9, 2020 17 minutes ago, iborguk said: For example https://www.amazon.co.uk/Draper-SMS-22277-Socket-Memory/dp/B008H14SH0/ref=sr_1_2?crid=3NZZAQK1JJ65G&dchild=1&keywords=draper+memory+saver&qid=1604947779&sprefix=Draper+memo%2Caps%2C167&sr=8-2 Ah, that’s more like it, was looking at some ‘OBD’ devices which straight away lost me! This is much more straightforward. Link to comment Share on other sites More sharing options...
GTSMarky Posted November 10, 2020 Report Share Posted November 10, 2020 I keep my now 6 year old BGTS battery well conditioned, but I am expecting to change it soon (to a lighter one for sure!). I woudl just have removed & replaced it, am I missing something ? Cheers Link to comment Share on other sites More sharing options...
Menoporsche Posted November 10, 2020 Report Share Posted November 10, 2020 Had my battery changed at Norauto (French Halfords), they charged me 20 bucks for 15 mins work apparently as they applied a "memory saver". No idea what it saved, as I don't have radio or memory seat presets, but it didn't save the clock time. Link to comment Share on other sites More sharing options...
Scubaregs Posted November 10, 2020 Report Share Posted November 10, 2020 6 minutes ago, Menoporsche said: No idea what it saved, as I don't have radio or memory seat presets, but it didn't save the clock time. Did you remember where you left the car? There's your answer. 😁 Link to comment Share on other sites More sharing options...
Menoporsche Posted November 10, 2020 Report Share Posted November 10, 2020 Who said that? Link to comment Share on other sites More sharing options...
DaveEFI Posted November 10, 2020 Report Share Posted November 10, 2020 21 hours ago, martyn said: Quick question, In the event of a battery change, would it be possible to use your c-tech battery charger plugged into the cigar lighter under the armrest to maintain a charge to the car? And would there be any difference by selecting the AGM setting or Recond? No problem at the mo with the battery but it would be good to know for the future! Most chargers which have reverse connection protection do so by using battery volts to operate a relay inside which, when made, connects the charger to the battery. The relay coil has a diode in series, so won't make if the polarity is wrong. This also means the charger won't work with a totally flat battery, or no battery at all. CTEK do a very expensive version which says it can be used as a battery substitute, but don't say how it gets round this. Link to comment Share on other sites More sharing options...
DaveEFI Posted November 10, 2020 Report Share Posted November 10, 2020 21 hours ago, martyn said: Quick question, In the event of a battery change, would it be possible to use your c-tech battery charger plugged into the cigar lighter under the armrest to maintain a charge to the car? And would there be any difference by selecting the AGM setting or Recond? No problem at the mo with the battery but it would be good to know for the future! Most chargers which have reverse connection protection do so by using battery volts to operate a relay inside which, when made, connects the charger to the battery. The relay coil has a diode in series, so won't make if the polarity is wrong. This also means the charger won't work with a totally flat battery, or no battery at all. CTEK do a very expensive version which says it can be used as a battery substitute, but don't say how it gets round this. Link to comment Share on other sites More sharing options...
iborguk Posted November 10, 2020 Report Share Posted November 10, 2020 54 minutes ago, Menoporsche said: Who said that? It's dark in here, isn't it ? Link to comment Share on other sites More sharing options...
CMA Posted November 10, 2020 Report Share Posted November 10, 2020 Changed the battery on my previous 981 without using any memory saver or other power source. Suffered no side effects at all. Had no memory seats though Link to comment Share on other sites More sharing options...
Paul P Posted November 10, 2020 Report Share Posted November 10, 2020 Battery replacement (disconnect and reconnect) will likely result in psm errrr (easy to sort left lock , right lock drive a bit ) windows one touch reset. Sat nav takes up to 15 mins to find itself, clock reset, total trip count /calc etc get reset. Some harder so see adaptions (dme etc ) Not a show stopper but for a few quid if you have the donor battery (or a charger) then saves you having to reset. worse of the battery goes completely flat. That upsets the car. In some cars requiring a handover reset to ge tbskc things like heated seats, interior lights and various other things. if you have no choice or feel lucky then swap and to quote an Aussie mate “she’ll be right” bit if you a choice then you might save yourself some aggro Link to comment Share on other sites More sharing options...
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