How long does it take to recharge using solar?

Solar recharge time depends on sunlight intensity and angle. Direct midday sun charges faster than morning or late afternoon light, and cloudy conditions slow the process significantly. You can also recharge from a USB wall adapter when sunlight isn't available.

Can this charge a smartphone multiple times?

The number of full phone charges depends on your device's battery size and the power bank's capacity. Smaller phones may get multiple charges, while larger smartphones will get fewer. The solar panel extends total capacity by adding charge between uses.

The housing is built to handle outdoor conditions and weather exposure typical of camping and hiking. It is not designed for submersion in water. Keep the USB port covered when not in use to protect connections from moisture.

Backup Core

b corp
carbon neutral

The 3-second version

Built-in solar panel recharges the battery from sunlight
Folds flat for compact storage in packs or vehicles
USB output powers phones, headlamps, and small devices
Solar charging requires direct sunlight and patience
Limited capacity compared to wall-charged banks

Why it's on GiftsFeed

Rechargeable power bank with integrated solar panel

Most portable batteries die at exactly the wrong moment because there's no outlet within fifty miles. The Backup Core solves that by making the charger part of the battery itself—the solar panel isn't an accessory you forget at home, it's folded into the same unit that holds the charge.

That matters when you're three days into a trip and your headlamp is blinking red. Instead of rationing power or cutting the adventure short, you set this in the sun while you make coffee and get back to full by lunch. For anyone who regularly goes places without outlets, having a way to refill from daylight turns a battery from a countdown timer into actual backup.

Good gift when

Backpackers and campers who need off-grid power
People who want emergency backup without outlet access
Outdoor enthusiasts spending multiple days away from civilization

Skip it if You need high-capacity charging for laptops or power-hungry devices

If you're giving it

No sizing to guess

Practical for anyone who camps, hikes, or travels to remote areas

The details

The Backup Core is a portable power bank built with a fold-out solar panel that captures sunlight to recharge its internal battery. When you need to top off a phone, headlamp, or other USB device away from an outlet, unfold the panel and let it collect energy, or plug it into a wall charger before you leave.

The integrated solar array folds flat against the body for transport, keeping the footprint small enough to stash in a pack side pocket or glove box. A USB output port delivers power to your device, while the onboard battery stores what the panel collects so you can charge gear after dark or on overcast days.

LED indicators show remaining capacity at a glance. The housing is built to handle outdoor conditions, with a design that stands up to the bumps and weather that come with trail use or car camping. Because the panel is part of the unit rather than a separate accessory, you always have a way to recharge without relying on grid power.

BioLite

Backup Core

Compact backup battery that charges from the sun or USB

$1,999at bioliteenergy.com

Quantity

Buy from BioLite

Ships and sold by BioLite. About this merchant

The 3-second version

Built-in solar panel recharges the battery from sunlight
Folds flat for compact storage in packs or vehicles
USB output powers phones, headlamps, and small devices
Solar charging requires direct sunlight and patience
Limited capacity compared to wall-charged banks

Cheaper alternatives

Questions

How long does it take to recharge using solar?: Solar recharge time depends on sunlight intensity and angle. Direct midday sun charges faster than morning or late afternoon light, and cloudy conditions slow the process significantly. You can also recharge from a USB wall adapter when sunlight isn't available.
Can this charge a smartphone multiple times?: The number of full phone charges depends on your device's battery size and the power bank's capacity. Smaller phones may get multiple charges, while larger smartphones will get fewer. The solar panel extends total capacity by adding charge between uses.
Is this waterproof?: The housing is built to handle outdoor conditions and weather exposure typical of camping and hiking. It is not designed for submersion in water. Keep the USB port covered when not in use to protect connections from moisture.