Petzl ACCU CORE Rechargeable Battery
The Petzl ACCU CORE Rechargeable Battery is a versatile, wallet-friendly replacement for many Petzl helmet lights, prized for its balance of weight, runtime and straightforward USB charging. It earns a top spot for helmet replacement because it integrates seamlessly with multiple lamp models and usually costs less than high-capacity specialty packs, making it a practical choice for users who want reliable performance without the bulk or price premium of larger cells. Compared with the heavier Black Diamond BD 1800 and the high-capacity Fenix cell, the ACCU CORE trades maximum runtime for lower cost and better helmet compatibility.
Reliable runtime - cave-friendly
USB charging - camp-ready
Reliable runtime - cave-friendly
USB charging - camp-ready
Review Summary
"Users report the Petzl ACCU CORE is a reliable, convenient rechargeable pack that delivers consistent runtime and seamless compatibility with many Petzl headlamps; occasional buyers note capacity is lower than larger external batteries but appreciate the built-in USB charging and compactness."
Featherweight pack - forget-it's-on
Official Petzl replacement rechargeable pack compatible with many Petzl helmet lamps.
Featherweight pack - forget-it's-on
Official Petzl replacement rechargeable pack compatible with many Petzl helmet lamps.
Recreational Enjoyment
Eco-Friendly Living
Time-Saving Convenience
The Petzl ACCU CORE Rechargeable Battery is a versatile, wallet-friendly replacement for many Petzl helmet lights, prized for its balance of weight, runtime and straightforward USB charging. It earns a top spot for helmet replacement because it integrates seamlessly with multiple lamp models and usually costs less than high-capacity specialty packs, making it a practical choice for users who want reliable performance without the bulk or price premium of larger cells. Compared with the heavier Black Diamond BD 1800 and the high-capacity Fenix cell, the ACCU CORE trades maximum runtime for lower cost and better helmet compatibility.
Reliable runtime - cave-friendly
USB charging - camp-ready
Featherweight pack - forget-it's-on
Official Petzl replacement rechargeable pack compatible with many Petzl helmet lamps.
USB-rechargeable battery that offers dependable runtime for everyday helmet use.
Reliable runtime - cave-friendly
USB charging - camp-ready
Featherweight pack - forget-it's-on
Official Petzl replacement rechargeable pack compatible with many Petzl helmet lamps.
USB-rechargeable battery that offers dependable runtime for everyday helmet use.
$60-90 CAD
Black Diamond BD 1800 Rechargeable Battery
The Black Diamond BD 1800 Rechargeable Battery is positioned as a higher-capacity, rugged replacement pack ideal for extended tours and multi-day use where runtime matters more than weight. It stands out among helmet replacement batteries by offering noticeably longer operating time than compact packs like the Petzl ACCU CORE or Princeton Tec Vizz, though it can be bulkier and typically costs more than entry-level options. For users prioritizing extended field performance on helmets, the BD 1800 is a strong technical and practical choice compared with smaller, cheaper alternatives.
Pocketable power - tiny but mighty
Fast top-up - coffee-break charge
Pocketable power - tiny but mighty
Fast top-up - coffee-break charge
Review Summary
"Owners praise the Black Diamond BD 1800 for its long runtime and straightforward USB recharge, with many saying it noticeably extends lamp use; a minority mention it adds weight and is proprietary so it only fits certain Black Diamond models."
Cold-friendly cells - winter-ready
Replacement pack designed for Black Diamond headlamps that need longer runtime.
Cold-friendly cells - winter-ready
Replacement pack designed for Black Diamond headlamps that need longer runtime.
Recreational Enjoyment
Eco-Friendly Living
Enhanced Physical Well-Being
The Black Diamond BD 1800 Rechargeable Battery is positioned as a higher-capacity, rugged replacement pack ideal for extended tours and multi-day use where runtime matters more than weight. It stands out among helmet replacement batteries by offering noticeably longer operating time than compact packs like the Petzl ACCU CORE or Princeton Tec Vizz, though it can be bulkier and typically costs more than entry-level options. For users prioritizing extended field performance on helmets, the BD 1800 is a strong technical and practical choice compared with smaller, cheaper alternatives.
Pocketable power - tiny but mighty
Fast top-up - coffee-break charge
Cold-friendly cells - winter-ready
Replacement pack designed for Black Diamond headlamps that need longer runtime.
Higher-capacity cell (around the 1800 mAh class) to extend burn time on medium/high modes.
Pocketable power - tiny but mighty
Fast top-up - coffee-break charge
Cold-friendly cells - winter-ready
Replacement pack designed for Black Diamond headlamps that need longer runtime.
Higher-capacity cell (around the 1800 mAh class) to extend burn time on medium/high modes.
$40-70 CAD
Petzl ACCU NAO+ Rechargeable Battery
The Petzl ACCU NAO+ Rechargeable Battery is engineered specifically for high-output helmet lamps and reactive lighting systems, delivering sustained power for demanding use cases where consistent brightness is essential. It commands a premium over the ACCU CORE but provides better thermal and discharge characteristics for performance-focused headlamps, making it the preferred replacement for users who run advanced Petzl models on technical climbs or night navigation. Compared with general-purpose packs in this list, the ACCU NAO+ is tailored to high-drain applications and is worth the extra cost when pairing with compatible high-output helmets.
Reactive-ready - smart-beam buddy
Long endurance - night-owl approved
Reactive-ready - smart-beam buddy
Long endurance - night-owl approved
Review Summary
"The Petzl ACCU NAO+ is widely seen as the best match for NAO+ users—providing high capacity and stable performance for reactive lighting—though some find it expensive and heavier than standard packs."
Seamless swap - tool-free change
Specifically made for the Petzl NAO+ to preserve reactive lighting performance and runtime.
Seamless swap - tool-free change
Specifically made for the Petzl NAO+ to preserve reactive lighting performance and runtime.
Recreational Enjoyment
Time-Saving Convenience
Eco-Friendly Living
The Petzl ACCU NAO+ Rechargeable Battery is engineered specifically for high-output helmet lamps and reactive lighting systems, delivering sustained power for demanding use cases where consistent brightness is essential. It commands a premium over the ACCU CORE but provides better thermal and discharge characteristics for performance-focused headlamps, making it the preferred replacement for users who run advanced Petzl models on technical climbs or night navigation. Compared with general-purpose packs in this list, the ACCU NAO+ is tailored to high-drain applications and is worth the extra cost when pairing with compatible high-output helmets.
Reactive-ready - smart-beam buddy
Long endurance - night-owl approved
Seamless swap - tool-free change
Specifically made for the Petzl NAO+ to preserve reactive lighting performance and runtime.
Higher-capacity design and thermal optimization to support sustained high-output use on helmets.
Reactive-ready - smart-beam buddy
Long endurance - night-owl approved
Seamless swap - tool-free change
Specifically made for the Petzl NAO+ to preserve reactive lighting performance and runtime.
Higher-capacity design and thermal optimization to support sustained high-output use on helmets.
$100-140 CAD
Princeton Tec Vizz Battery Pack
The Princeton Tec Vizz Battery Pack is a compact, cost-effective replacement designed for commuter and industrial helmet lights, offering easy swap-in convenience and a low added weight profile. It’s notable for delivering sensible runtime at a budget-friendly price, making it an attractive option for users who want dependable day-to-day performance without investing in larger, more expensive cells like the Fenix ARB-L18 series. Against the other options here, the Vizz pack prioritizes affordability and compactness over maximum capacity or specialized high-output support.
Slim profile - barely noticeable
Snap-in mount - click-and-go
Slim profile - barely noticeable
Snap-in mount - click-and-go
Review Summary
"Princeton Tec Vizz battery packs get mixed but generally positive feedback: buyers like the affordable price and adequate runtime, while complaints center on bulkiness, cable/connector fragility, and lower capacity versus premium rechargeable packs."
Balanced weight - no neck-ache
Affordable, compact replacement pack for Princeton Tec Vizz helmet lights.
Balanced weight - no neck-ache
Affordable, compact replacement pack for Princeton Tec Vizz helmet lights.
Recreational Enjoyment
Enhanced Physical Well-Being
Time-Saving Convenience
The Princeton Tec Vizz Battery Pack is a compact, cost-effective replacement designed for commuter and industrial helmet lights, offering easy swap-in convenience and a low added weight profile. It’s notable for delivering sensible runtime at a budget-friendly price, making it an attractive option for users who want dependable day-to-day performance without investing in larger, more expensive cells like the Fenix ARB-L18 series. Against the other options here, the Vizz pack prioritizes affordability and compactness over maximum capacity or specialized high-output support.
Slim profile - barely noticeable
Snap-in mount - click-and-go
Balanced weight - no neck-ache
Affordable, compact replacement pack for Princeton Tec Vizz helmet lights.
Available in NiMH or small Li-ion variants depending on model for moderate runtime.
Slim profile - barely noticeable
Snap-in mount - click-and-go
Balanced weight - no neck-ache
Affordable, compact replacement pack for Princeton Tec Vizz helmet lights.
Available in NiMH or small Li-ion variants depending on model for moderate runtime.
$20-40 CAD
Fenix ARB-L18-3500U Battery
The Fenix ARB-L18-3500U Battery is the technical leader on this list, offering a high-capacity 3500 mAh rechargeable cell that maximizes runtime for helmet-mounted lights and high-drain tasks. Its clear advantage is industry-leading energy density and modern USB charging, which outperforms the other packs when long runtime and fewer top-ups are the priority, though it is heavier and often more expensive and may require an adapter for some helmet light models. For users who want the best possible run-time for demanding night missions, the Fenix cell is the market-leading technical choice despite the trade-offs in size and cost.
High capacity - endurance champ
USB recharge - road-ready
High capacity - endurance champ
USB recharge - road-ready
Review Summary
"The Fenix ARB-L18-3500U is frequently praised for its high-capacity 3500mAh cell, reliable performance, and convenient USB charging; reviewers commonly cite excellent value and durability with very few complaints."
Rugged cell - tank-like durability
Fenix 21700 3500mAh USB-rechargeable cell offering high capacity for power-hungry helmet lights.
Rugged cell - tank-like durability
Fenix 21700 3500mAh USB-rechargeable cell offering high capacity for power-hungry helmet lights.
Recreational Enjoyment
Eco-Friendly Living
Enhanced Physical Well-Being
The Fenix ARB-L18-3500U Battery is the technical leader on this list, offering a high-capacity 3500 mAh rechargeable cell that maximizes runtime for helmet-mounted lights and high-drain tasks. Its clear advantage is industry-leading energy density and modern USB charging, which outperforms the other packs when long runtime and fewer top-ups are the priority, though it is heavier and often more expensive and may require an adapter for some helmet light models. For users who want the best possible run-time for demanding night missions, the Fenix cell is the market-leading technical choice despite the trade-offs in size and cost.
High capacity - endurance champ
USB recharge - road-ready
Rugged cell - tank-like durability
Fenix 21700 3500mAh USB-rechargeable cell offering high capacity for power-hungry helmet lights.
Built-in USB charging and protection circuitry for safe, fast recharges on the trail.
High capacity - endurance champ
USB recharge - road-ready
Rugged cell - tank-like durability
Fenix 21700 3500mAh USB-rechargeable cell offering high capacity for power-hungry helmet lights.
Built-in USB charging and protection circuitry for safe, fast recharges on the trail.
$30-50 CAD