Samsung are well known for their batteries in the vaping community for being reliable and accurate to what capacities and maximum currents are stated.
The 25R is a 2500mah battery with a safe continuous output of 20Amp.
The better choice for higher powered devices and mechanical mods at the expense of capacity.
The 30Q is a 3000mah battery with a safe continuous output of 15Amp.
Ideal in a regulated devices due to its higher capacity.
We supply these cells in a dual 18650 hard case for safe transport and storage.