




Couldn't load pickup availability
Free shipping on all order above $49.99 to most countries.
Most flashlights can directly get 5 years warranty; battery and accessories get 1 year warranty.
Any questions, please email to info@sperasflashlight.com
![]() |
![]() |
![]() |
![]() |
![]() |

Most chargers do one thing. The PD21700 works twice as hard, bridging the gap between tactical gear maintenance and everyday digital survival.
| Feature | Standard Chargers | 🔥 SPERAS PD21700 |
|---|---|---|
| Functionality | Charger Only | 2-in-1: Charger + Power Bank |
| Slot Control | Shared Current | Independent Detection & Control |
| Battery Health Tech | Basic Trickle | TC/CC/CV 3-Stage Charging |
| Conversion Efficiency | ~70% - 80% | Up to 90% Efficiency |
Once you have charged 18650 or 21700 batteries inserted into the PD21700, you can plug your standard USB charging cable into the output port and connect it to your phone, tablet, or GPS. The parallel balance discharge tech will safely draw power from your batteries to charge your digital devices, making it perfect for emergencies and camping.
Yes! The PD21700 features independent slot control. The built-in microcomputer will automatically detect the voltage and manage the optimal charging current for each battery separately, ensuring safe and efficient charging even with mixed battery sizes.
Absolutely. The charger utilizes a smart TC/CC/CV 3-stage process and will automatically and precisely cut off power once the battery hits 4.2V. Coupled with overcharge, overheat, and reverse-polarity protections, as well as a flame-retardant body, it is completely safe for unattended charging.








