my first guess would be the altenator.
You should never drive a car around for long after jump starting a dead battery. This puts an enormous strain on the alternator. Alternators are designed to keep a good battery charged, not to charge a dead battery. You can easily burn out a diode in the alternator. Jump start the engine and drive it somewhere and connect a battery charger to the battery and charge it fully.
Fully charged should be around 12.8
It's not healthy, but yeah. The trouble with a charging battery is hydrogen buildup from lead-acid (car) batteries.
The battery should drain slowly on an iPhone 5s. If the battery was charged correctly the first time. It should take around 10 hours to drain.
It depends on the state of charge. A fully charged lead-acid 12V battery will measure around 13.6V, the same battery at the end of useful charge will be approximately 10.5V
Yes and no. Yes: The alternator will charge the battery any time the engine is running (even at idle) if the battery's voltage is below the threshold (usually around 12 volts) so that the voltage regulator triggers the alternator to generate power (around 14 volts) until the battery is charged up. No: If there is not enough consumption of power, the battery may be charged enough and the voltage regulator will not trigger power generation.
The relative density of a fully charged battery is typically around 1.28 to 1.3 for lead-acid batteries. This measurement can vary based on the type of battery and its specific composition.
Around 13.5 volts or can be as high as 14 volts.
no. It can overheat the battery, damaging it.Here is a separate answer: I just charged a 12v car battery using a 110v DC Welder set on 10 amps, and putting out 50v. I had to check the battery every 30 minutes for overheating, which it did not. I know this is not recommended as I risk damaging the car's electrical system and the battery, but I was in a pinch.I only charged it for 1.5 hours, and there is a substantial risk that the battery will explode. I disconnected the terminals at the welder to avoid igniting the hydrogen that forms around the battery during the process.Other risks include overcharging the battery because chargers designed for 12v drop to a trickle when the battery is fully charged, avoiding damage to the battery.
It could be a bad battery or regulator. To check the regulator to see if it putting out the correct voltage check the battery voltage while the bike is running. It should be around 14 volts.
A 900mAh 7.4v Li-Polymer battery should be charged at a rate of around 1C, which means 900mA or 0.9A. Charging at a higher rate can decrease the battery's lifespan and safety. Always follow the manufacturer's recommendations for charging rates.
The charge of a lithium-ion battery is typically around 3.7 volts per cell when fully charged. This voltage can vary slightly depending on the specific chemistry and configuration of the battery.