24/7 mobile jump start for your Subaru Ascent (1980–2026) in Sacramento using Surge-Protected 2,500A Peak 12V Pro Booster Pack.
Front left engine bay.
Subaru Outback, Forester, Crosstrek, and Ascent models have a well-known smart-charging algorithm and DCM (Data Communication Module / Starlink telematics) parasitic battery drain issue, plus electric rear liftgates that jam when the battery dies while open at camp or grocery stores.
Post-boost verification of 110A–150A Mitsubishi Electric Smart Alternator output (13.8V–14.8V on 12V; 27.6V–28.4V on 24V commercial).
| Generation | Battery Group | CCA | Alternator | Starter | System Notes |
|---|---|---|---|---|---|
| Ascent (2021–2026) | Group 35, Group 25, Group 47 (H5) / Group 48 (H6) EFB/AGM | 550–750 CCA | 110A–150A Mitsubishi Electric Smart Alternator (14.2V–14.8V) | 1.2 kW – 1.6 kW Denso / Mitsubishi Boxer Starter | Smart LIN/BSD Regulated AGM / Aux |
| Ascent (2015–2020) | Group 35, Group 25, Group 47 (H5) / Group 48 (H6) EFB/AGM | 550–750 CCA | 110A–150A Mitsubishi Electric Smart Alternator (14.0V–14.6V) | 1.2 kW – 1.6 kW Denso / Mitsubishi Boxer Starter | High-Reserve AGM / EFB Start-Stop |
| Ascent (2008–2014) | Group 35, Group 25, Group 47 (H5) / Group 48 (H6) EFB/AGM | 550–750 CCA | 110A–150A Mitsubishi Electric Smart Alternator (13.8V–14.4V) | 1.2 kW – 1.6 kW Denso / Mitsubishi Boxer Starter | High-CCA AGM / Lead-Acid |
| Ascent (1998–2007) | Group 35, Group 25, Group 47 (H5) / Group 48 (H6) EFB/AGM | 550–750 CCA | 110A–150A Mitsubishi Electric Smart Alternator (13.8V–14.2V) | 1.2 kW – 1.6 kW Denso / Mitsubishi Boxer Starter | OEM Group Lead-Acid / AGM |
| Ascent (1980–1997) | Group 35, Group 25, Group 47 (H5) / Group 48 (H6) EFB/AGM | 550–750 CCA | 110A–150A Mitsubishi Electric Smart Alternator (13.6V–14.2V) | 1.2 kW – 1.6 kW Denso / Mitsubishi Boxer Starter | Standard BCI High-CCA |
