![How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports](https://s3.us-east-2.amazonaws.com/prod.mm.com/uploads/2021/05/17/1621281189_img_9214_mmthumb.jpeg)
How to methodically find the battery drain in our E46–and fit an Opt | BMW M3 | Project Car Updates | Grassroots Motorsports
![OPTIMA Batteries Yellowtop AGM Spiralcell Dual Purpose Battery, Group Size D34/78, 12 Volt 750 CCA - Walmart.com OPTIMA Batteries Yellowtop AGM Spiralcell Dual Purpose Battery, Group Size D34/78, 12 Volt 750 CCA - Walmart.com](https://i5.walmartimages.com/seo/OPTIMA-Batteries-Yellowtop-AGM-Spiralcell-Dual-Purpose-Battery-Group-Size-D34-78-12-Volt-750-CCA_c51e4d53-8e8b-4183-9159-008d766eb3ec_1.d7f71557196c7429151237ae5498a6bf.jpeg)
OPTIMA Batteries Yellowtop AGM Spiralcell Dual Purpose Battery, Group Size D34/78, 12 Volt 750 CCA - Walmart.com
![Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive](https://m.media-amazon.com/images/I/81XhsbpRMSL._AC_UF894,1000_QL80_.jpg)
Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive
![Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive](https://m.media-amazon.com/images/I/81Z57NicFuL._AC_UF350,350_QL80_.jpg)
Amazon.com: OPTIMA D200+ Battery Maintainer and Lithium Charger for 12 Volt Starting Batteries Including Lithium, AGM, Flooded and Powersports : Automotive
![Restoring an Optima Battery | Desulfate Optima Battery | Optima Battery Issues | Bundys Garage - YouTube Restoring an Optima Battery | Desulfate Optima Battery | Optima Battery Issues | Bundys Garage - YouTube](https://i.ytimg.com/vi/EFcI2in-uXc/sddefault.jpg)