Fast charging slows down earlier than it used to
2024 Rivian R1S Dual-Motor, about 14,500 miles. On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side va…
Alternator & Charging
Repairs & Ownership
Anyone else: Fast charging slows down earlier than it used to
On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side variation, battery temperature, software, or an ac…
2022 Tesla Model 3 — fast charging tapers earlier than it used to
2022 Tesla Model 3 Long Range, about 82,500 miles. On comparable road trips the charge rate now starts tapering sooner. I am trying to separate charger sharing, battery temperature, software changes…
2025 Lucid Air Pure — fast charging slows down earlier than it used to
On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side variation, battery temperature, software, or an ac…
1972 Chevrolet C10 — no crank with full dash power, then it starts later
Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to measure during the actual failure?
2022 Tesla Model 3 — battery dies after the car sits for a weekend
2022 Tesla Model 3 Long Range, about 68,000 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the clea…
2020 Mercedes-Benz E-Class — battery dies after the car sits for a weekend — Westchester owner question
2020 Mercedes-Benz E-Class E450, about 98,000 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank.
BatteryScout447Community StarterAug 24, 20262020 Mercedes-Benz E-Class E450Westchester8 replies0 helpful
2017 Audi Q7 — no crank with full dash power, then it starts later
2017 Audi Q7 3.0T, about 130,000 miles. Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to…
2025 Porsche Macan Electric 4S — apartment charging without a dedicated garage outlet
I can charge at work sometimes but not at home. For people living in apartments, what combination of public charging, workplace charging and occasional fast charging has actually been practical? Tryi…
2018 Volvo S90 — no crank with full dash power, then it starts later
Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to measure during the actual failure?
1988 Toyota Land Cruiser — no crank with full dash power, then it starts later
This started as a small annoyance and I finally decided to track it down. 1988 Toyota Land Cruiser FJ62, about 242,500 miles. Twice I have had full lights and accessories but no crank. After waiting…
Fast charging slows down earlier than it used to
On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side variation, battery temperature, software, or an ac…
2024 Acura MDX — no crank with full dash power, then it starts later
Twice I have had full lights and accessories but no crank. After waiting a few minutes it starts normally. Battery terminals look clean. What would you want to measure during the actual failure? I am…
2019 Audi S4 — battery dies after the car sits for a weekend — Tampa owner
2019 Audi S4 Premium Plus, about 141,000 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanes…
2024 Kia EV9 — battery dies after the car sits for a weekend — Cleveland owner
Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanest parasitic-draw test on a modern car that takes…
Fast charging slows down earlier than it used to
On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side variation, battery temperature, software, or an ac…
BoostedDetailerCommunity StarterAug 13, 20262022 Tesla Model 3 Long RangeLas Vegas8 replies0 helpful
Apartment charging without a dedicated garage outlet
I can charge at work sometimes but not at home. For people living in apartments, what combination of public charging, workplace charging and occasional fast charging has actually been practical? I'd…
1993 Mazda RX-7 — battery dies after the car sits for a weekend
1993 Mazda RX-7 Touring, about 215,000 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanest…
2018 Volvo S90 — battery dies after the car sits for a weekend
2018 Volvo S90 T6, about 63,500 miles. Battery passes a quick test and charging voltage looks normal, but after two or three days parked the car sometimes will not crank. What is the cleanest parasit…
2024 Rivian R1S Dual-Motor — need advice: Fast charging slows down earlier than it used to
On road trips the car used to hold a higher charge rate longer. Now it starts tapering sooner even when the pack is warm. Could this be charger-side variation, battery temperature, software, or an ac…