Panasonic NCR18650PF 2900mah Li-Ion Hybrid IMR Rechargeable Battery

Panasonic has always used proprietary chemistries and manufacturing processes in their cylindrical cells.  It's why they are better than the rest.
The NCRs are a high-drain, low impedance, safer chemistry cell.  They're equal in safety to an IMR cell while carrying higher charge capacity.  However, they have a lower drain limit and higher impedance than an IMR cell.
The NCR18650PF cells are a suitable substitute for any mod that calls for an IMR cell.  As far as safety, the same applies to these cells as IMR cells.

• Brand Name: Panasonic
• Size: 18650
• Model: NCR18650PF
• Type: Li-Ion Hybrid IMR(High Drain)
• Rated Capacity: 2900mAh
• Max Continuous discharge: 10A
• Max Discharge Pulse Current (5-6 sec.): 18A
• Max Charge Current 1.35A
• Nominal Voltage: 3.7V
• Full Charge Voltage Voltage: 4.2V
• Dimensions: 18.25mm X 65mm
• Rechargable: Yes
• Protected: No (not required with Hybrid chemistry)
• Chemistry: Li-ion Hybrid
• Style: Flat Top
• Color: Green

Warnings:

• Do not overdischarge/overcharge 
• Do not Store discharged
• Do not short circuit 
• Do not dispose of in fire 
• Do not expose to extreme heat or water 

 NOTE: Use special caution when working with Li-ion cells, they are very sensitive to charging characteristics and may explode or burn if mishandled. Make sure the user has enough knowledge of Li-Ion rechargeable batteries in charging, discharging and assembly before use. Always charge in/on a fire-proof surface. Never leave charging batteries unattended. We are not responsible for damage if there is any modification of the batteries/chargers in any form or shape (including pack making). We are not responsible for any damage caused by misuse or mishandling of Li-Ion batteries and chargers. We only recommend using Lithium Ion rechargeable batteries with a control circuit (protection PCB) to assure safe charge, discharge, etc, use of lithium ion batteries with a protection circuit is potentially hazardous.