These are genuine Keystone 1042 18650 battery holders. They are made of heat resistent nylon and have gold plated contacts. Probably the smalles battery holder on the market. I`ve looked and looked and these seem to be the best out there.
Keystone 1042 18650 Battery Holder
- Brand: Keystone
- Product Code: 93
- Availability: In Stock
- Ex Tax: £1.83