991.1 Battery Replacement DIY
#121
Burning Brakes
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sdl2112 you are correct! I called again and was informed the Interstate MT5-49/H8 is the AGM battery. I was given erroneous information and I apologize for passing on wrong info. On a positive note, My auto shop is willing to apply a fully credit for the non-AGM battery (MTP-49/H8) and apply it to the AGM type Interstate AGM Battery. Please note the Interstate AGM battery are almost $double the cost!
#122
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![](https://cimg4.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/7a9ee71f_7ed6_411a_9e2b_cb3c98a14e04_aba72d9a00b36b152b784c00b3efd692f7bd104a.jpeg)
MT5-49/H8
![](https://cimg5.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/848484ab_fccf_43aa_bf25_34f1205ca5d0_3487b7f24e796743b3fb7d328a0da7b00c2c4aec.jpeg)
Sticker
![](https://cimg6.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/469feca1_b5bf_463e_a8fa_1f1d6850763e_8a2155d2c68b453adb618bfa33d6d201429b66cd.jpeg)
Installed
#123
Intermediate
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I just replaced my original 5 year old battery with the Interstate MT5-48 H6. It has similar size, weight (45.6 lbs), specs of my original Porsche battery. It's also AGM.
#124
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Step 2 - Open the Frunk and remove the top cover with the Porsche stamp on it.
![](https://cimg0.ibsrv.net/gimg/rennlist.com-vbulletin/1409x940/beginning_step_2219a96e901a43ba27b1edbe62e11f418a35bcd7.jpg)
does the top cover have to be put back? What’s wrong with just leaving it off? Every ounce counts. 😎
#125
Racer
Thread Starter
#126
Rennlist Member
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Good news: Interstate dealer is giving my a full refund on the MT49 towards the MTS49AGM... bad news is they are on backorder and not sure when it will be available. I had originally chose them because the nearest Batteries Plus dealer is 150 miles away. So for now my car sits...
#127
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Originally Posted by G99x.y
Step 2 - does the top cover have to be put back? What’s wrong with just leaving it off? Every ounce counts.
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Viper pilot (06-26-2020)
#128
#129
Rennlist Member
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Good news: Interstate dealer is giving my a full refund on the MT49 towards the MTS49AGM... bad news is they are on backorder and not sure when it will be available. I had originally chose them because the nearest Batteries Plus dealer is 150 miles away. So for now my car sits...
#130
Burning Brakes
#131
#132
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Originally Posted by G99x.y
"303" ?
![Smilie](https://rennlist.com/forums/images/smilies/smile.gif)
Aerospace 303. We put that **** on everything.
#135
Nordschleife Master