Sanyo UR16650ZTA battery 2500 mAh (unprotected) matches with the PIPELINE PRO SLIM. 

In order to use the full capacity of this battery, it should be charged up to 4.35 volts. We recommend the XTAR VPS charger (select 3.8 volts) for the maximum charge of the battery. 

Charging end voltage: 4.35 volts

Discharge current: 5 amps

Discharge voltage: 2.7 volts

Warranty and guarantee: 

2 years implied warranty

3 months guarantee

Electronic cigarettes are not "healthy", they are just a less harmful alternative to regular cigarettes. Electronic cigarettes are not suitable for children and minors under the age of 18 (eighteen), non-smokers, people with allergies to nicotine and/or propylenglycol, pregnant and breastfeeding women and people with cardiovascular diseases.