GP Batteries is one of the world's leading suppliers of primary and rechargeable batteries. They are the largest consumer battery manufacturer in China, and supply an extensive range of battery products to original equipment manufacturers, leading battery companies, and consumer retail markets under their own GP brand name. GP Batteries is a truly world-wide company, with production facilities in several Asian nations, and marketing and trading offices throughout Asia, Europe, and North America.

GP Batteries offers a wide variety of batteries for all applications. Their Powerbank rechargeable batteries and chargers are available in multiple configurations for all usage requirements, including high-capacity NiMH AA and AAA rechargeable batteries for consumer use. GP manufactures a wide variety of cylindrical 9-volt and Digi 1 primary batteries, as well as an array of specialty batteries for cameras, watches, hearing aids, and electronic appliances. GP Batteries also offers lithium ion, lithium polymer and nickel metal hydride rechargeable batteries in various capacities and sizes for a variety of applications. These battery packs are ideal for notebook computers, digital cameras, camcorders, emergency lighting, and more.

HOB Custom Power (formerly House of Batteries) is a supplier of GP Batteries located in the United States. They supply standard battery cells, as well as manufacturing custom battery packs for a variety of industries. HOB Custom Power (formerly House of Batteries) has more than 200 years of battery design experience and maintains ISO certification, RoHS compliance, and ITAR registration.