Need some extra juice for your smartphone or tablet? Well we have the ZeroLemon SolarJuice battery on sale over in the Deals Store. It's a 20,000mAh battery pack, that's also waterproof and shock proof. And it's going for just $49.99. This would typically be selling for $100, but we are offering it for just $49.99, giving you about 50% off. Not bad right?