Semi-Solid Lithium-Ion Battery Solutions for Adventure Flashlights

High-energy, cold-resistant, and safer power packs for explorers, mountaineers, and emergency responders.

Adventure flashlights face cold, moisture, and mechanical shocks. They need compact, high-capacity batteries that keep stable output in harsh conditions. PKNERGY’s semi-solid Li-ion batteries improve thermal stability and safety while maintaining high energy density for long runtime.

Application Background

High energy density: long runtime in compact form factor
Temperature range: typically −20 °C ~ +60 °C
Durability: vibration/impact/shock resistance
Rechargeability: hundreds of cycles with low capacity fade
Safety: OVP/UVP/OCP/SCP with smart BMS/PCM

PKNERGY Battery Solution

Key Options

Chemistry: Semi-solid Li-ion for thermal/mechanical stability
Voltage: 3.7 V single cell up to 14.8 V packs
Capacity: ~1000–8000 mAh (by LED power & runtime)
Form factor: slim/lightweight packs to fit flashlight bodies
BMS/PCM: OVP/UVP/OCP/SCP & NTC temp protection
Connectors/Housing: custom leads and rugged housings
Compliance: UN38.3, IEC62133, CE, UL, MSDS

Design Targets

Cold-weather performance with appropriate cell selection
Constant-current output for stable lumen profiles
Fast recharge path and cycle-life assurance
Ingress protection for rain/snow use

Explore PKNERGY engineering: pknergy.com

Value for Buyers / PM / Engineers

Flexible MOQ, competitive pricing, scalable production
Thermal testing, BMS integration, and regulatory support
Proven reliability across hundreds of cycles in extreme temps
Global logistics with full certification documents

Case Studies

Tactical Adventure Flashlight

Pack: 7.4 V 4000 mAh (2S1P) semi-solid
Form: 90 × 40 × 25 mm inside body
Result: ~5 h continuous high-intensity lighting at −10 °C; recharge ~3 h; 3,000+ units/month; no safety incidents

Outdoor Explorer Flashlight

Pack: 3.7 V 2500 mAh single-cell semi-solid
Result: up to 6 h consistent output for extended excursions

Recommended Specs & Integration

Item	Recommendation	Notes / Links
Chemistry	Semi-solid Li-ion	Custom Packs
Voltage	3.7 V / 7.4 V / 11.1 V / 14.8 V	BMS Options
Capacity	~1000–8000 mAh	By LED wattage & runtime
Protection	OVP/UVP/OCP/SCP + NTC	Smart BMS/PCM
Compliance	UN38.3, IEC62133, CE, UL	PKNERGY

FAQ

How do you size the pack for lumen targets?

We model LED current profiles and driver efficiency to match capacity and discharge rate to your runtime and brightness targets.

Cold-weather performance?

Cell selection and BMS temp windows are tuned for −20 °C operation with derating; we can validate on your thermal profiles.

Connector and housing customization?

Yes—rugged housings, waterproof grommets, custom leads, and quick-swap battery bays are available.

Next Step

Share LED wattage, desired runtime, ambient temperatures, size limits, and connector type. We’ll return a tailored pack proposal within one working day.