Shenzhen Beiersite E-Business Limited
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About BestCell manufacturer



We are an Chinese team that launched in Shenzhen, Guangdong. Now we are spread out all over the world covering all time zones, and with dedicated workers in China and two warehouses in Shenzhen & Hong Kong.


Our lithium-ion batteries are used in:

  • Laptop and power-tool packs
  • Electric cars and electric bikes
  • Military equipment and medical devices
  • Home energy storage
  • IoT, Wireless sensors, irrigation equipment, and more...


***DANGER!!!*** We have found a significant amount of all lithium-based batteries for sale are fake and potentially dangerous. This includes those on Ebay, Amazon, and from some of the best-known suppliers both in the West and in Asia.

  • Some suppliers will salvage old, damaged batteries from laptop packs and repackage them with new PVC tubing (Grade C).
  • Some repackage brand name cells, but grossly exaggerate mAh and discharge ratings.
  • Some purchase bare cells and sell them without the required PTC and other safety mechanisms (which is technically illegal in US).


There are even dozens of accounts of counterfeit batteries exploding in the hands of customers causing serious harm, property damage, and lawsuits. The market is so flooded with counterfeit batteries, that even honest suppliers have a very difficult time knowing how to tell the difference.


We aim to solve the problem by doing one thing and doing it well. We only wholesale Grade A, authentic, lithium-ion batteries. In particular we focus almost exclusively on the cylindrical 18650 batteries and more recently have expanded to other types like polymer and specialized custom battery packs.

We values honest and open information, prices, and easy access to free expert advice. We have a big factory to stock highest-quality batteries, and best prices for our clients. 


Five reasons why you need BestCell

  • Stock the very best, authentic, tested, lithium-ion batteries. Our cells are cutting-edge and you never have to worry about fakes
  • Have the capacity to provide 1M+ batteries or more at a time with custom electrolyte additives and shapes
  • Are honest, transparent, and open
  • Provide engineering for custom battery packs, from sourcing the best PCB, IC, to assembling small packs or complex high-voltage EV packs and testing them
  • We are experts and handle all shipping, customs, and dangerous goods requirements worldwide with delivery to your door

Quality and lowest prices

We provide only the best batteries at the best pricesAll our batteries are guaranteed authentic. We do our own testing to make sure we only sell the highest quality Grade A cells from manufacturers like Panasonic, Panasonic-Sanyo, for Sony, for Samsung SDI and LG Chemical. 

If you require other brands like Chinese or lower Grade cells we can also provide them in a transparant matter with testing reports and cycle life guarantee.


Who are we?

We are a Chinese company mainly operating in China and Hong Kong. 


How do I buy batteries from US?

  1. Browse our up-to-date Catalog
  2. Place an order by email or trader manager
  3. Check your email for confirmation

Are you interested in purchasing 10,000 or more cells, need custom packs, or have other special requests? Please contact us.