ras62

I've just installed this JMT LiFePo used for large V twin bike motors. 540cca and weight is 1.9kg so a 16.5kg saving over the original battery. It comes with an internal BMS and external test button / indicator which is quite handy. It worked out at about £180 delivered so good value for Lithium tech.

Streetdaddy

My wife's new car needs a battery. Thinking of switching over my heavy battery from my 964 . I drive my car 1 to 2 times a week. Not a big deal to keep it on the trickle charger. Seems like a big spend for a battery. Is there any rennlist discount for the voltphreaks? Can somebody help me make the decision? I'm torn if it's worth it !

Streetdaddy

Anybody want to see if they will do a group buy? They have done it before ( voltphreaks)

Streetdaddy

Nobody else want to lightweight battery?

911Jetta

If it continues to work for Jack Olsen, then my next battery will be a Battery Tender LiFEPO4 battery.
https://rennlist.com/forums/964-foru...battery-3.html

Streetdaddy

He's had it for years... Looks like he is still happy with it.

Streetdaddy

Tony said maybe mid October.. Start saving your pennies.

JackOlsen

Still going strong. Less than 3.5 pounds.

kos11-12

I have the same for 2 years with no issues, but cutting the power when left for over a day ,

Super90

Jack, thanks for chiming in.

Would this work for a car that sits most of the week and used a day or two? Or maybe only driven every two weeks, etc.? Or would I need to put a tender on it?

Much appreciated !

R.

JackOlsen

I would use a multimeter to check if you have any parasitic drain issues with your electrical system, first. But other than that, I wouldn't have a concern.

Railmaster.

Smart! But make sure that YOU don't gain weight over the next five years! That would make the next generation light weigt battery useless in Your car!

kos11-12

One thing to consider , If your car stays in cold weather, like for instance over a night and even if you cut the power the small batterie will suffer and it would struggle to start the car , I never left the car out in the cold for several nights with out driving it but I guess , if left for a week it may be too weak , maybe the idea is to buy one with a bigger amperage , What's your experience guys ?

Vancleef

I can report back after my trip to the Sierras this weekend with temps in the 30-40 range and altitude of 9100' where I parked the car before heading up the trail. I have the same Deltran Battery Tender as seen above, and after sitting overnight it had what seemed like just enough power to crank once. Luckily for us we were able to get the car going and get out of the storm that was coming after hiking 3 miles down from 10400' in the snow/rain.

My biggest worry with the battery is cold weather, and the previous night we stay in a hotel before getting our permits to hike up. Even down at Bishop, CA in the 40s and elevation of 4150 it had just enough power to crank once, maybe twice. After experiencing this I decided to insulate the battery with some extra gear we brought with us.

For now I'm ok with the battery because I live 40 miles north of Los Angeles and it does fine here, but I may look into buying another one and daisy chaining them together if it is possible. The batteries are so small and lightweight its insane. Another possible strategy would be to build a box to insulate the battery from cold weather.

JackOlsen

My own strategy would be simpler. On trips to areas where I might see sub-40° temperatures, I'll bring a jump starter along.

I can't imagine insulation keeping the battery temperature from dropping overnight.