If you're looking for a battery charger that's both highly portable and extremely powerful, it's time to pick up the Efest Slim K2 Battery Charger. This charger boasts two bays and a USB slot. Most importantly, this charger works quickly while protecting your batteries and keeping you safe.

The Efest Slim K2 Battery Charger is a compact charger that boasts incredible power. Compatible with a wide range of lithium batteries, this advanced charger utilizes the latest technology to get your batteries fully charged in no time. You can charge two batteries at once thanks to the two slots. Each slot is individually powered so that you can charge two batteries without sacrificing a fast charging time.

Equipped with loads of safety features, the Efest Slim K2 Battery Charger will keep your batteries healthy while preventing safety issues of all kinds. This charger offers reverse polarity protection, overcharge protection, overheating protection, and short-circuit protection. This way, you can charge and walk away without any worries.

Features and Specs:

• Compatible with: 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 26500, 26650
• Portable Design with Quality Piano Strings
• Battery Life LED Indicator Light
• Dual Slot 5V/1A Micro USB Charger
• AC Input Power: AC 100~240V 50/60Hz
• DC Output Power: DC 5V 1A
• DC Input Power: DC 5V 1A
• 1A CC Current: 1000mA (+/-10%)
• Auto Cut-Off Voltage: 4.20 (+/-0.05V)
• CV Cut-Off Current: <100mA
• Standby Current: <20mA
• Activation Current: 50mA~100mA
• Auto Recharge Voltage: 4.10 (+/-0.10V)
• Operation Temperature: 0C ~ 40C
• Storage Temperature: -40C ~ 70C

Because of its slim design, you can bring your Efest Slim K2 Battery Charger with you wherever you go. The USB charging cable allows you to charge your batteries while you're on the road. Overall, this is one of the most portable battery chargers on the market today.