GBT Technologies (Shenzhen) Ltd is a subsidiary of GRAND BATTERY TECHNOLOGIES BHD (in Short-GBT), Malaysia. GBT has patent and fully automatic production line on Rechargeable Alkaline Batteries (RAM Battery). GRANDCELL is the brand name of such rechargeable battery.
GBT Shenzhen was incorporated in 2004 and the main focus of the business are:
1. R&D, manufactures Solar Lighting products which use RAM battery as power sources on the products. GRANDSOLAR has been very successful in South Africa, Malaysia and Indonesia so far.
2. Promote and marketing RAM Batteries in China. 
GBTSZ insists on "Quality is the life of the company. Customer's Satisfaction is our aim"