Engineers in Germany are turning a salt cavern into a massive redox flow battery
The system is more than 5 times the size of Tesla's Australia project
Apple extends its warranty for 1st-gen Apple Watches
Extension covers damages cause by battery expansion
Razer announces a USB battery pack for the Blade Stealth
Extend the Blade Stealth's battery life to "past 15 hours"
After a year of use, Tesla Powerwall systems are performing well with 90% utility savings
Return on investment drops to under 10 years, some as low as 8
Tesla's grid-connected Powerpack station comes online in California
System can power 2,500 homes for a full day
Consumer Reports to re-test MacBook Pro battery after Apple fixes bug causing inconsistent results
A hidden Safari setting was to blame
Consumer Reports stands by its MacBook Pro battery results, refuses to run tests again
There has been some controversy surrounding Consumer Reports' results
FCC filing suggests the Nintendo Switch will have a non-removable battery
Let's hope the Switch's battery lasts a while
Gionee's M2017 smartphone packs a 7,000mAh battery that lasts for days
The tablet-sized battery will last for days
Apple removes 'time remaining' battery life estimates from MacBooks
Users complained about poor MacBook battery life, so Apple removed battery life estimates
Apple will replace faulty iPhone 6s batteries that keep shutting down the handset
Apple says the problem affects a "very small" number of devices
