This rock-surface battery pack is just what you need to stay charged no matter what the day brings.

The SHARKK packs tons of power and includes optimized outputs for charging both tablets and phones, and thanks to Cult of Android deals, it’s half price for a limited time.

If you find yourself constantly looking for a power outlet to top up your smartphone or tablet while you’re on the go, you need a portable battery pack.

The Innori Portable Battery Pack will fuel your gadgets time and time again with its impressive 22,400mAh of power, and trio of USB outlets for simultaneous charging. It’s stylish and incredibly useful, and thanks to Cult of Android Deals, you can get it with 43% off for a limited time.

Inside the Galaxy S6. Screenshot: Cult of Android

Samsung has already made it clear that the Galaxy S6 doesn’t have a removable battery like its predecessors, but that doesn’t mean it cannot be replaced at all. The 17-minute teardown video below proves it is possible to get under the handset’s hood to its internals.

If you rely on your smartphone and other mobile devices, the last thing you want to see before the end of your day is a low battery warning. But if you slip a TravelCard into your wallet, you have 1,500mAh of extra juice that’ll top up your devices when you need it most.

And thanks to Cult of Android Deals, you can get yours for just $29 for a limited time.

SolidEnergy’s battery versus comparable products from Xiaomi and Apple. Photo: SolidEnergy

It’s been a while since we’ve seen vast improvements to lithium-ion batteries, which power the portable gadgets we rely on today. But that’s all about to change, thanks to a company called SolidEnergy.

Born out of MIT in 2012, the startup has built a battery that stores more energy than that inside Apple’s iPhone 6, but measures half the size.