If it was your car that has been "jumped" then the energy went from your "friends" battery to yours.
Your friends battery lost some charge, whilst yours gained some charge.
Once the cables were detached - no energy was transferred.
No, as long as you do not have the blower motor running.
School does drain your battery because the satellite connection in school has been made to drain your battery in cell phones and any type of electronic device.
Battery is getting old and will not hold a charge or there is a drain on it. Battery is getting old and will not hold a charge or there is a drain on it.
On my espace a wiring fault turns on the ignition circuit at random draining the battery if not spotted. This is without the keys in the ignition. I fitted a battery isolater switch and use this to make sure it dont drain while parked up. seems to happen mostly when frosty etc.
If no accessories have been added that are draining the battery it is probably the voltage regulator . The voltage regulator will short out creating an open circuit , and the battery will drain back through it .
a bad alternator or battery or both
I've just installed a new car radio, and even though it is switched off (and the face has been removed) with the rest of the car completely off, the battery is flat 2 days later. You have a dead cell in the battery or something else is on draining the battery. A radio that is not on will not drain a battery in 2 days or even 2 weeks.
Alternator not charging battery due to a bad fusable link?
I would suggest either using 10x the regular amount of chlorine, or using a phosphate remover
Depends upon how the battery was discharged, but generally yes, once a lead acid battery has been fully discharged from leaving lights on or similar methods which drain the battery slowly it will never recover. The only time this is not true is when the battery is drained from the starter motor due to the vehicle not starting for some other reason. In this case the battery will recharge without any long term damage provided the recharge is done within around 24-48 hours.
They wear out over time, there could be a parasitic drain on the electrical system, something might have been left on.
No statistics have been kept on the number of battery chickens that get urine rash, but it seems like few of them would, as the cages have openings that allow urine to drain freely.
The Nintendo DS battery has been made to be recharged around 500 times, after which the battery life will be 70% of its maximum charge. The length at which a rechargeable battery will last depends on how frequently you charge it. For older devices, it is usually recommended to allow the battery to drain as much as possible before recharging.