Beautifully engraved and very classy, the eGo-K (King) battery - 1100mAh 3.7-4.2v features manual operation with a blue LED button.The eGo-K battery has a 5 click On/Off feature, 10 second cutoff - sealed 510 connector, and works great for dripping.Ego K4 (Huskee) battery Specification:   

• battery size    D14mm *L97mm
• Full battery can keep for    1150 puffs
• battery Capacitty    1100mah
• battery weight    34g
• battery battery voltage    3.3-4.2V
• charging time    3.5hours
• Battery life    300 times recharge circles
• Resistance    2.5-2.9 ohms
• USB Adapter    EU Style
• Battery protection    5 times prtection
• Atomizer Compatibility    CE4/CE5/CE6/cCE7/CE9, DCT, Vivi Nova, Vivi tank.Protank. Mini protank,T8.T3s
• Certificate    CE/ROHS/FCC

T3S atomizerUpgraded version of the T3. The new "s" version now has a separate base and coil, the "s" stands for separate. The reason for the upgrade was to reduce costs and waste by making the base reusable and now the only piece that needs replacing is the coil head. And of course the reduced cost id being passed along to you when you purchase replacement coils for the T3s Bottom Coil Clearomizer. Fits all our eGo eCig products and come blank ready to fill with your favorite liquid! No syringe needed to fill, just screw the bottom off, fill with your favorite premium eLiquid, screw the bottom back on and you're ready for the best vaping experience ever. The advantage of bottom feeding clearomizers is the atomizer is at the bottom which is where the liquid stays when you vape meaning the wick is always wet. The Kanger T3s Bottom Feeding Clearomizer is easy to fill, produces great flavor and vapor, and no worries of leaking or burnt wick taste. Holds 3ml of e juice. This is a must have for serious vapers!  Replacement T3s Atomizer Coils are available in 1.8ohm, 2.2ohm, and 2.5ohm. Coils are the same for the T3s and MT3s. If you are using a standard eGo battery the best option for you is the 1.8ohm or 2.2ohm heads. If you are using an eGo Variable Voltage Battery or a Higher Voltage Device the 2.5ohm is the best option for you. Product Comes With:1 - T3s Bottom Coil Clearomizer (BCC) Tube Assembly with Drip Tip1 - T3s Bottom Coil Clearomizer Base1 - T3s Bottom Coil Clearomizer 2.5ohm Atomizer HeadComes assembled ready to fill with you favorite eLiquid How to fill T3s Bottom Feeding Clearomizer: -  Unscrew the bottom assembly from the tube  -  Hold the T3s tube upside down with the drip tip facing down  -  Fill with 3ml E-Juice by tilting the clearomizer at a slight angle and dripping juice down the inside wall against the outer wall of clearomizer.  -  Do not put eliquid into the center tube as it will leak out the bottom of clearomizer.  -  Screw the bottom assembly back onto tube.  -  Screw onto electronic cigarette device and you're ready to vape.