Which headlamps does this battery pack work with?

The HLB2500 is compatible only with the Nitecore HA27 UHE and HA29 UHE headlamps. It connects via the dedicated port on those specific models and will not work with other headlamps.

How cold can it get before the battery stops working?

The pack is rated to operate at temperatures as low as -40°C (-40°F). It continues to deliver current in conditions that cause most rechargeable and alkaline batteries to lose capacity or fail.

Is it actually waterproof or just water-resistant?

It's rated IPX8, which means it can handle full submersion underwater. Rain, snow, and wet conditions won't affect performance or damage the pack.

Can I charge it with a regular USB-C cable?

Yes. The pack charges using a standard USB-C cable connected to any USB power source—wall adapters, power banks, laptop ports, or solar panels.

How do I know when it's fully charged?

The pack includes a built-in charging indicator that displays battery status. You can check charge level at a glance without needing a separate tester.

Nitecore HLB2500 All-Weather Battery Pack for HA29 UHE and HA27 UHE

waterproof
rechargeable

The 3-second version

Operates reliably in temperatures as low as -40°F
IPX8 waterproof rating withstands full submersion
USB-C charging works with power banks and solar panels
Only fits HA27 UHE and HA29 UHE headlamps
Adds weight versus disposable cells
Requires USB-C charging access

Why it's on GiftsFeed

Rechargeable battery pack built to power headlamps through extreme cold and wet

Most rechargeable headlamp batteries quit or lose most of their capacity once the temperature drops below freezing, leaving you fumbling with backup cells in the dark. This pack is engineered to keep delivering current at -40°F, which makes it a real option for winter use instead of a mild-weather convenience. The IPX8 seal means you're not babying it through wet weather, and USB-C charging means you can top it off from the same power bank that runs your phone or GPS. If you already own an HA27 or HA29 headlamp and you're tired of buying disposables every season—or you need a light that works in actual winter—this is the pack that turns those headlamps into year-round tools.

Good gift when

Winter hikers and alpinists who need light in sub-zero conditions
People running multi-day trips where resupply isn't practical
Anyone tired of disposable battery costs and waste
Users of Nitecore HA27 or HA29 headlamps seeking rechargeable power

Skip it if Only compatible with Nitecore HA27 UHE and HA29 UHE headlamps—you'll need one of those specific models to use this pack at all.

Specs

Compatibility: Nitecore HA27 UHE and HA29 UHE headlamps
Operating Temperature: -40°C to +60°C (-40°F to +140°F)
Waterproof Rating: IPX8
Charging Interface: USB-C
Built-in Protections: Overcharge, short circuit, over-discharge

What's included

HLB2500 battery pack

If you're giving it

No sizing to guess

Useful only if the recipient owns a Nitecore HA27 UHE or HA29 UHE headlamp.

The details

This battery pack replaces disposables in two specific Nitecore headlamps—the HA27 UHE and HA29 UHE—and keeps them running in conditions that shut down ordinary cells. The housing is sealed to IPX8 standards, meaning it survives full submersion, and the chemistry inside continues to deliver current at temperatures down to -40°F. That matters when you're moving before dawn in January or working outside a hut at altitude, where alkaline cells lose most of their capacity and lithium primaries cost more every trip.

USB-C charging means you recharge from a power bank, a truck dash port, or a solar panel, and the built-in indicator shows charge state without guesswork. Internal protections guard against overcharge, short circuit, and over-discharge, so the pack tolerates being left plugged in or drained fully without damage. The shell is impact-resistant enough to handle drops onto rock or ice, and the connector is molded to fit the headlamp's dedicated port.

Because it's rechargeable, you eliminate the need to carry spare disposables on multi-day trips, and you stop throwing cells away after every outing. The pack is sized to balance runtime with weight, and it tucks into the headlamp system without adding bulk that snags on a hood or helmet brim. It's purpose-built for environments where a dead light isn't just inconvenient—it's a safety issue.

Nitecore

Nitecore HLB2500 All-Weather Battery Pack for HA29 UHE and HA27 UHE

IPX8-rated power source for Nitecore HA27 and HA29 headlamps, tested to -40°F

$19.95at nitecorestore.com

Quantity

Buy from Nitecore

Ships and sold by Nitecore. About this merchant

The 3-second version

Operates reliably in temperatures as low as -40°F
IPX8 waterproof rating withstands full submersion
USB-C charging works with power banks and solar panels
Only fits HA27 UHE and HA29 UHE headlamps
Adds weight versus disposable cells
Requires USB-C charging access

Questions

Which headlamps does this battery pack work with?: The HLB2500 is compatible only with the Nitecore HA27 UHE and HA29 UHE headlamps. It connects via the dedicated port on those specific models and will not work with other headlamps.
How cold can it get before the battery stops working?: The pack is rated to operate at temperatures as low as -40°C (-40°F). It continues to deliver current in conditions that cause most rechargeable and alkaline batteries to lose capacity or fail.
Is it actually waterproof or just water-resistant?: It's rated IPX8, which means it can handle full submersion underwater. Rain, snow, and wet conditions won't affect performance or damage the pack.
Can I charge it with a regular USB-C cable?: Yes. The pack charges using a standard USB-C cable connected to any USB power source—wall adapters, power banks, laptop ports, or solar panels.
How do I know when it's fully charged?: The pack includes a built-in charging indicator that displays battery status. You can check charge level at a glance without needing a separate tester.