Battery Thoughts
09-15-2016, 11:38 AM
#31
Rennlist Member
I have used that longer battery. The OE hold-down clamp on the passenger side of the battery tray can be moved outwards enough to align with an un-tapped hole. Simply add a nut to the capscrew and secure it in the new position.
09-15-2016, 12:16 PM
#32
The Porsche battery tray is designed to accommodate the euro H6, H7 and H8 sizes of batteries. As Smitten mentioned, the left side hold-down can move from the threaded H7 hole to one of the others. Simply get a common 8mm x1.25 nut and hold it in position with a small plier under the tray to bolt up the battery. When we changed our battery I was assigned the job of holding the nut in position, so if I can do it, so can you.
An H8 AGM battery will have the power to start 100 cars simultaneously, your car can sit forlornly out in the wind-swept back lot at the airport for one year and a H8 will start it up with authority. Considering how many battery problems people have with a 997 this is a good mod. It will add about 7 pounds over a stock H 7 though.
By the way, most Bosh batteries sold in America are not the made in Germany product. They are spit out by one of the U S factories that make private label batteries. I don’t know if that’s a good thing or a bad thing!
An H8 AGM battery will have the power to start 100 cars simultaneously, your car can sit forlornly out in the wind-swept back lot at the airport for one year and a H8 will start it up with authority. Considering how many battery problems people have with a 997 this is a good mod. It will add about 7 pounds over a stock H 7 though.
By the way, most Bosh batteries sold in America are not the made in Germany product. They are spit out by one of the U S factories that make private label batteries. I don’t know if that’s a good thing or a bad thing!
The following users liked this post:
Jaws1 (02-09-2020)
09-15-2016, 02:09 PM
#33
Rennlist Member
The Porsche battery tray is designed to accommodate the euro H6, H7 and H8 sizes of batteries. As Smitten mentioned, the left side hold-down can move from the threaded H7 hole to one of the others. Simply get a common 8mm x1.25 nut and hold it in position with a small plier under the tray to bolt up the battery. When we changed our battery I was assigned the job of holding the nut in position, so if I can do it, so can you.
An H8 AGM battery will have the power to start 100 cars simultaneously, your car can sit forlornly out in the wind-swept back lot at the airport for one year and a H8 will start it up with authority. Considering how many battery problems people have with a 997 this is a good mod. It will add about 7 pounds over a stock H 7 though.
By the way, most Bosh batteries sold in America are not the made in Germany product. They are spit out by one of the U S factories that make private label batteries. I don’t know if that’s a good thing or a bad thing!
An H8 AGM battery will have the power to start 100 cars simultaneously, your car can sit forlornly out in the wind-swept back lot at the airport for one year and a H8 will start it up with authority. Considering how many battery problems people have with a 997 this is a good mod. It will add about 7 pounds over a stock H 7 though.
By the way, most Bosh batteries sold in America are not the made in Germany product. They are spit out by one of the U S factories that make private label batteries. I don’t know if that’s a good thing or a bad thing!
09-23-2016, 10:24 AM
#35
Burning Brakes
I responded to this thread on page 2 recommending an AGM battery and then later stating using my Battery Tender (BT) to keep all the memory setting intact while batteries are swapped.
As luck would have it, my C2S barely cranked yesterday so I had to run out for a new battery yesterday evening. I only got 5 years of life out of my previous wet cell that was on a BT the entire second half of it's life. I found an H7 sized AGM @ AutoZone for $225. (Walmart, the only retailer in my little village, didn't carry ANY AGM styles batteries) and swapped it out in 20 mins. I did use my BT to hold the memories and it worked just fine.
As luck would have it, my C2S barely cranked yesterday so I had to run out for a new battery yesterday evening. I only got 5 years of life out of my previous wet cell that was on a BT the entire second half of it's life. I found an H7 sized AGM @ AutoZone for $225. (Walmart, the only retailer in my little village, didn't carry ANY AGM styles batteries) and swapped it out in 20 mins. I did use my BT to hold the memories and it worked just fine.
12-13-2019, 02:47 PM
#36
I had the tender plugged in when I changed mine out a few years ago and lost nothing. No memory loss and no codes.
A battery is a battery is a battery.
As long as it's 12 volts and 700+ CCA, your fine.
Get a national brand from a national chain with a national warranty.
Then if you have a failure down the road, because it never happens at a convenient time, you 'll be able to get a replacement easily.
Specialty batteries means specialty prices and specialty store hours.
A battery is a battery is a battery.
As long as it's 12 volts and 700+ CCA, your fine.
Get a national brand from a national chain with a national warranty.
Then if you have a failure down the road, because it never happens at a convenient time, you 'll be able to get a replacement easily.
Specialty batteries means specialty prices and specialty store hours.
12-14-2019, 09:20 PM
#37
Three Wheelin'
12-14-2019, 09:40 PM
#38
Rennlist Member
12-16-2019, 12:12 PM
#39
Premium Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
If any are interested in Lithium we have a model with Wireless built in Jump STarting, so you will never come back to a dead battery or not be able to open your frunk. It has a full BMS (Battery Management System) that prevents over-discharge, over-charge, and has short-circuit protections and other features to give it the longer possible life. 8-10 years.
https://antigravitybatteries.com/
https://antigravitybatteries.com/products/starter-batteries/automotive/ag-h6-rs/
https://www.youtube.com/watch?v=W4zZ0ZAIRkc
https://antigravitybatteries.com/
https://antigravitybatteries.com/products/starter-batteries/automotive/ag-h6-rs/
https://www.youtube.com/watch?v=W4zZ0ZAIRkc
12-16-2019, 01:48 PM
#40
When it’s time to buy a battery, I’m gonna splurge on one of those $600 light weight batteries. I know people are worried about them exploding, so yall try to talk some sense into me haha!!
12-16-2019, 02:44 PM
#41
Instructor
A fact about AGM batteries - don't let them run down too far. They're irrecoverable past a certain point - like if you accidentally leave the doors unlocked for a couple weeks (alarm motion sensor active) and come back. There's at least a chance that a lead acid can be resuscitated. An AGM will simply take nothing after that. I'm on my 3rd AGM, under warranty thankfully.
12-16-2019, 03:05 PM
#42
Premium Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
On another point there are different chemical make ups of Lithium Batteries... we use LIfePo4, a much more stable and less volatile format of lithium... which is NOT like Lithium Polymer which is used in the Hooverboards and Phones or laptops that you have heard the stories and seen video about exploding. So all Lithium-Ion is not the same at all... there are several variants used commercially, our is one of the safest out there. Any other questions let me know...
We are having a big Last Chance Christmas sale also if you visit https://antigravitybatteries.com/
Some really cool Battery products.
02-09-2020, 07:38 PM
#44
Rennlist Member
Went to the garage to check on the car today and despite the trickle charger showing a steady green light, the battery is as dead as a doorknob. Guess I’ll need to grab a new one. I could tell that it was starting to take a crap before I put the car away in November. What are the current recommendations?
02-09-2020, 09:11 PM
#45
Three Wheelin'
Always remove the negative cable first, then the positive cable. When you connect the battery, connect the positive end first. So the order is: Remove black, remove red, attach red, attach black.