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fmcolorado
Join Date: Oct 2015
Location: Colorado
Posts: 16
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Which battery maintainer to purchase
I have a 73.5 911 with two lead-zinc wet-cell batteries connected in parallel. I would like to purchase a trickle-charge maintainer so the batteries don't discharge when the vehicle sits idle for 4-5 months over the winter. The cigarette lighter is OFF when the vehicle is not running. Porsche sells a "Pro-Battery Maintainer" that costs 2.5 times the CTEK MSX 5.0 Is there something different in the Porsche-branded unit that would justify it's higher cost (other than the Porsche name)? I don't want to spend more than I need to. Thanks, Fred
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09-17-2020, 10:05 AM
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Registered
Join Date: Jul 2013
Posts: 631
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You should also consider the Battery Tender offerings....have used the successfully for years with my Porsches. I also have several CTEK units from PORSCHE in use, but if you're looking for the best bang for the buck, try the Battery Tender units.
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09-17-2020, 10:21 AM
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fmcolorado
Join Date: Oct 2015
Location: Colorado
Posts: 16
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Would it be better to buy two battery maintainers, disconnect the batteries from the car, and charge/maintain them independently over the cold winter months? Ofcourse, that means 2 times the cost. Fred
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09-17-2020, 10:24 AM
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If you buy one, try to get one that will charge not only lead acid batteries, but the AGM style batteries. May need it to charge up an AGM battery one of these days & you'll be glad you have a compatible charger.
__________________
'88 Carrera Guards Red '70 VW Beetle Yukon Yellow 
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09-17-2020, 10:34 AM
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fmcolorado
Join Date: Oct 2015
Location: Colorado
Posts: 16
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What do you people think of this unit for maintaining the two batteries independly:
Battery Tender 2-Bank Charger: 12V, 1.25 Amp Battery Charger with 2 Charging Banks - Smart Battery Charger and Maintainer |
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09-17-2020, 10:43 AM
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fmcolorado
Join Date: Oct 2015
Location: Colorado
Posts: 16
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Costs $100. Fred
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09-17-2020, 10:43 AM
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Few months back, Costco had Battery Tenders for $39. Picked up two. Work great. I had a cheap Harbor Freight tender for an old battery and it seems to work fine as well.
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09-17-2020, 10:59 AM
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'73 911 T Targa
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I have a GUEST two bank battery charger that maintains two batteries that are not connected to one another. Works like a champ and doesn't appear to over-charge.
I also have a CTEK that is used in the car when the batteries are installed. That works great too. Last edited by Quickstep192; 09-17-2020 at 11:34 AM.. |
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09-17-2020, 11:27 AM
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Registered
Join Date: Apr 2007
Location: Bellingham, WA
Posts: 253
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going on 5 years with 2 NOCO Genius G3500 Both work great
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68 Beetle 68 to 72 sold 72 911T Nov 71 to present P/U @ factory Nov 19. Car was gift to myself for surviving the army 67 VW split window 74 to 76 sold 81 VW caddy 81 to present |
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09-17-2020, 11:55 AM
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