Li-Ion 10440 Cylindral Cell (AAA size) 3.7V, 400mAh

Specifications:

Nominal Voltage     Average 3.7 V 
Nominal Capacity       400mAh,  
Max Charging current   0.45 A Max. 
Max Discharging Current   0.9 A (2c) max. 
Dimensions   10 Dia. x 43 Height ( mm ) 
Weight   17 g 
Internal Impedance:   Internal Impedance: less or equal to 110 milli-ohm (with PTC) 
Cycle Performance   80% of initial capacity at 300 cycles 

Cautions

Li-Ion Batteries may explode if charged or discharged improperly.
You must possess knowledge of electronic and understand hot to handle Li-ion battery. 
We reserve the right not to sell and void the warranty it you don't meet the above statement.
Never solder directly onto the Li-ion battery as overheat might cause battery to explode.
If you are making a pack or need to solder batteries together, you need to get battery with tabs on it.
You will solder to tabs instead directly onto the battery.
Please read more safety warning about Li-ion battery