The iPhone features an internal rechargeable lithium-ion battery. Some attacked nearby gun batteries of the Grande Battery. Some rechargeable flashlights have indicators for the state of charge of the battery. The UltraBattery is a hybrid rechargeable lead-acid battery and a supercapacitor. Latitude XP noticed as a first laptop with an optional Lithium-ion battery. It comes with a non-removable 4000mAh lithium polymer battery. A 28V DC battery provided emergency backup power. The partnership planned to pilot projects on battery management and charging infrastructure. The maximum ripple current for a typical 12V 100Ah VRLA battery is 5 amps. There is a small risk of battery explosion in devices modified to increase battery power. The watch comes without a replaceable battery. A "wet cell" battery has a liquid electrolyte. It was an ionization detector powered by a single 9-volt battery. Consider a very simple circuit consisting of four light bulbs and a 12-volt automotive battery. The BMS is also responsible for communications with the vehicle outside the battery pack.