Petzl Core Rechargeable Battery
The Petzl Core is positioned as the best-in-class OEM option for helmet rechargeable battery packs thanks to its compact 2600 mAh capacity and direct compatibility with Petzl helmet-mounted headlamps, offering a low-friction swap-in for users who prioritize fit and convenience. Compared with larger third-party packs in this list, the Core trades raw runtime for lighter weight, seamless integration and typically lower replacement cost when matched with Petzl lights—making it the practical choice for climbers and rescue professionals who need reliable, certified compatibility on helmets.
Compact powerhouse
USB-rechargeable
Compact powerhouse
USB-rechargeable
Review Summary
"Users say the Petzl Core delivers reliable, long-lasting power and is convenient for swapping into Petzl headlamps; some note it's less impressive on older lamps or with heavy use but overall very dependable. Build quality and OEM compatibility are consistently praised."
Clicks like Lego
Designed to integrate seamlessly with Petzl headlamps and helmet mounts.
Clicks like Lego
Designed to integrate seamlessly with Petzl headlamps and helmet mounts.
Recreational Enjoyment
Eco-Friendly Living
Time-Saving Convenience
The Petzl Core is positioned as the best-in-class OEM option for helmet rechargeable battery packs thanks to its compact 2600 mAh capacity and direct compatibility with Petzl helmet-mounted headlamps, offering a low-friction swap-in for users who prioritize fit and convenience. Compared with larger third-party packs in this list, the Core trades raw runtime for lighter weight, seamless integration and typically lower replacement cost when matched with Petzl lights—making it the practical choice for climbers and rescue professionals who need reliable, certified compatibility on helmets.
Compact powerhouse
USB-rechargeable
Clicks like Lego
Designed to integrate seamlessly with Petzl headlamps and helmet mounts.
USB-rechargeable and can double as a small power bank for mobile devices.
Compact powerhouse
USB-rechargeable
Clicks like Lego
Designed to integrate seamlessly with Petzl headlamps and helmet mounts.
USB-rechargeable and can double as a small power bank for mobile devices.
Black Diamond BD 1800 Rechargeable Battery
The Black Diamond BD 1800 is the market leader among lightweight OEM packs for helmet lights, delivering a balanced 1800 mAh profile that keeps helmet-mounted rigs low-profile and affordable. While it offers less capacity than the Fenix or Nitecore 21700 options, its cost-effectiveness and optimization for Black Diamond headlamps make it an attractive choice for recreational users who want OEM fit and predictable thermal and electronic behavior on helmets.
1800mAh muscle
Quick-swap design
1800mAh muscle
Quick-swap design
Review Summary
"Owners report the Black Diamond BD 1800 provides solid run-time and straightforward charging with good integration into BD headlamps, though a minority have experienced shorter-than-expected life or swelling after heavy cycles. It’s generally seen as a good value for BD users but not as premium as newer high-capacity packs."
Mountain-ready grin
Made for Black Diamond lights and helmet setups with straightforward mounting.
Mountain-ready grin
Made for Black Diamond lights and helmet setups with straightforward mounting.
Recreational Enjoyment
Skill Development & Mastery
The Black Diamond BD 1800 is the market leader among lightweight OEM packs for helmet lights, delivering a balanced 1800 mAh profile that keeps helmet-mounted rigs low-profile and affordable. While it offers less capacity than the Fenix or Nitecore 21700 options, its cost-effectiveness and optimization for Black Diamond headlamps make it an attractive choice for recreational users who want OEM fit and predictable thermal and electronic behavior on helmets.
1800mAh muscle
Quick-swap design
Mountain-ready grin
Made for Black Diamond lights and helmet setups with straightforward mounting.
Rechargeable with USB charging for convenient field top-ups.
1800mAh muscle
Quick-swap design
Mountain-ready grin
Made for Black Diamond lights and helmet setups with straightforward mounting.
Rechargeable with USB charging for convenient field top-ups.
$50-80 CAD
Fenix ARB-L21-5000U USB Rechargeable Battery Pack
Fenix’s ARB-L21-5000U stands out as the high-capacity, versatile option for helmet rechargeable battery packs, packing roughly 5000 mAh with USB charging and the ability to act as a powerbank for other gear—delivering the longest runtimes for high-output helmet lights in this set. It is heavier and more expensive than the OEM Petzl and Black Diamond cells but offers superior energy density and multi-device utility, which financially benefits users who want one pack to power both lights and phones on long trips.
Massive 5000mAh
USB-C powerbank
Massive 5000mAh
USB-C powerbank
Review Summary
"The Fenix ARB-L21-5000U is praised for high capacity, stable performance, and convenient USB recharge, with many users noting long runtimes and solid reliability on repeated use. Few users mention the premium price but agree it delivers class-leading endurance."
Pocket powerhouse
5000mAh 21700 cell with built-in USB-C charging for direct recharging.
Pocket powerhouse
5000mAh 21700 cell with built-in USB-C charging for direct recharging.
Time-Saving Convenience
Recreational Enjoyment
Eco-Friendly Living
Fenix’s ARB-L21-5000U stands out as the high-capacity, versatile option for helmet rechargeable battery packs, packing roughly 5000 mAh with USB charging and the ability to act as a powerbank for other gear—delivering the longest runtimes for high-output helmet lights in this set. It is heavier and more expensive than the OEM Petzl and Black Diamond cells but offers superior energy density and multi-device utility, which financially benefits users who want one pack to power both lights and phones on long trips.
Massive 5000mAh
USB-C powerbank
Pocket powerhouse
5000mAh 21700 cell with built-in USB-C charging for direct recharging.
Can act as a power bank while supplying stable high-capacity output to lights.
Massive 5000mAh
USB-C powerbank
Pocket powerhouse
5000mAh 21700 cell with built-in USB-C charging for direct recharging.
Can act as a power bank while supplying stable high-capacity output to lights.
$40-70 CAD
Nitecore NL2150HPR 21700 Battery
The Nitecore NL2150HPR 21700 cell is the technical leader for high-drain helmet lighting, offering a high-capacity, high-discharge single-cell solution that powers modern, high-lumen helmet lamps more efficiently than older formats. It typically undercuts proprietary premium packs on price while delivering comparable runtime and discharge performance, but requires compatible holders or adapters for helmet mounting—so it’s best for users who want a high-performance, value-conscious 21700 option and don’t mind a small integration step.
High-drain 21700
Long cycle-life
High-drain 21700
Long cycle-life
Review Summary
"Nitecore’s NL2150HPR 21700 is liked for its high capacity and consistent power delivery across many charge cycles, making it a popular upgrade for helmet lights; some users find it pricier than standard cells but worth it for runtime. Reliability and compatibility are commonly highlighted."
Sprint-grade punch
High-capacity 21700 cell optimized for high-drain helmet lights and flashlights.
Sprint-grade punch
High-capacity 21700 cell optimized for high-drain helmet lights and flashlights.
Skill Development & Mastery
Recreational Enjoyment
Enhanced Physical Well-Being
The Nitecore NL2150HPR 21700 cell is the technical leader for high-drain helmet lighting, offering a high-capacity, high-discharge single-cell solution that powers modern, high-lumen helmet lamps more efficiently than older formats. It typically undercuts proprietary premium packs on price while delivering comparable runtime and discharge performance, but requires compatible holders or adapters for helmet mounting—so it’s best for users who want a high-performance, value-conscious 21700 option and don’t mind a small integration step.
High-drain 21700
Long cycle-life
Sprint-grade punch
High-capacity 21700 cell optimized for high-drain helmet lights and flashlights.
Designed for stable output and good thermal performance under sustained loads.
High-drain 21700
Long cycle-life
Sprint-grade punch
High-capacity 21700 cell optimized for high-drain helmet lights and flashlights.
Designed for stable output and good thermal performance under sustained loads.
Lupine FastClick Battery 3.5 Ah
Lupine’s FastClick 3.5 Ah battery is the premium, helmet-focused solution in this group, pairing a robust 3500 mAh pack with a tool-free FastClick mounting system designed specifically for helmet and bike-light workflows. Although it carries a higher purchase price than general-purpose cells like Nitecore or Fenix, its proprietary connector, proven durability and optimized power delivery for high-output Lupine lamps justify the investment for professional riders and demanding users who prioritize fast swaps and rugged reliability.
FastClick mounting
3.5Ah longevity
FastClick mounting
3.5Ah longevity
Review Summary
"The Lupine FastClick 3.5 Ah battery is frequently described as robust, fast-mating, and built for intensive use with excellent runtime and durable construction, making it a favorite among serious riders. Most users accept the higher cost for the dependable performance and quick-attach convenience."
Click-and-go charm
3.5 Ah FastClick pack engineered for quick swapping on Lupine helmet mounts.
Click-and-go charm
3.5 Ah FastClick pack engineered for quick swapping on Lupine helmet mounts.
Time-Saving Convenience
Recreational Enjoyment
Eco-Friendly Living
Lupine’s FastClick 3.5 Ah battery is the premium, helmet-focused solution in this group, pairing a robust 3500 mAh pack with a tool-free FastClick mounting system designed specifically for helmet and bike-light workflows. Although it carries a higher purchase price than general-purpose cells like Nitecore or Fenix, its proprietary connector, proven durability and optimized power delivery for high-output Lupine lamps justify the investment for professional riders and demanding users who prioritize fast swaps and rugged reliability.
FastClick mounting
3.5Ah longevity
Click-and-go charm
3.5 Ah FastClick pack engineered for quick swapping on Lupine helmet mounts.
High-quality construction with robust weather resistance for demanding rides.
FastClick mounting
3.5Ah longevity
Click-and-go charm
3.5 Ah FastClick pack engineered for quick swapping on Lupine helmet mounts.
High-quality construction with robust weather resistance for demanding rides.
$180-240 CAD