STLTH Open Pod Kit vs. STLTH Link
Compare the STLTH Open Pod Kit and STLTH Link: fill method, capacity, power modes, bottle compatibility, and specifications. Includes current free-device promotions.
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The Efest Slim K2 Charger is a compact, high-quality battery charger designed for vapers and device users who need fast, reliable charging on the go. Engineered with a dual-slot design, this charger independently monitors each battery to deliver a safe and consistent charge every time. With Micro USB input, 1A charging, and a lightweight build, it’s an ideal choice for anyone looking for a portable lithium battery charger for vaping devices, flashlights, and tools.
Each charging slot features an LED indicator to clearly show charging status and when your batteries are fully charged. The Slim K2 integrates multiple safety protections—including reverse polarity protection, short-circuit protection, and overcharge protection—to ensure your batteries stay safe throughout the charging process.

Compatible with a wide range of 3.6V/3.7V lithium batteries, the Efest Slim K2 Charger works seamlessly with popular sizes such as 18650, 20700, and 21700 batteries, making it a versatile option for electronic cigarettes, flashlights, and compact electronic devices.
| Feature / Specification | Detail |
| Compatible With | 10440, 14500, 14650, 16340, 16650, 17650, 17670, 18350, 18490, 18500, 18650, 20700, 21700, 26500, 26650 |
| Design | Portable Design with Quality Piano Strings |
| Indicators | Battery Life LED Indicator Light |
| Charger Type | 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 | 0°C ~ 40°C |
| Storage Temperature | -40°C ~ 70°C |

Compare the STLTH Open Pod Kit and STLTH Link: fill method, capacity, power modes, bottle compatibility, and specifications. Includes current free-device promotions.
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