How long will this 12V battery last?

So I bought a 12V battery and a 800 Watt inverter for when load shedding hits again. I decided I'm taking it along to OppiKoppi though, for charging phones, powering lights etc. But I want to figure out how long it ... show over 12.9 volts in the morning.How to Improve iPad Battery Life in 5 Minutes

The new iPad claims 10 hours of battery life and does a good job of delivering, but the long charging time means that some users end up leaving the airport or hotel without a full charge ... Also disabling auto brightness will increase the battery ...How Long Does a Car Battery in a New Car Last?

Though battery problems are often associated with cold weather, Consumer Reports magazine says heat is a bigger enemy of car batteries and will take a bigger toll on performance ... of seeing whether it will hold a charge (or checking the electric eye ...How to Make Your Own Battery-Powered Gadget Chargers

The whole process, which is a lot like a miniature version of jump-starting a car, takes minutes ... enough juice to charge the battery, but hook up too many and you could burn out the whole thing. AA batteries are 1.5 volts each, so charging a 3.7-volt ...How much does it cost to charge an electric car?

It takes three-and-a-half hours to fully charge the battery ... electric car grant scheme as it's not classified as a car - it's labeled a 'heavy quadricycle.' The Nissan Leaf can drive up to 109 miles before it needs to be recharged, but that takes twice ...

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