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Blue rectangular solar power bank with integrated solar panel and LED flashlight

4XEM

4XEM 4XSOLARPWRBL 20000mAh solar power bank

SKU CH-MCYA-AD39W MPN 4XSOLARPWRBL

A 20000mAh lithium-polymer power bank recharges phones and tablets from sunlight or USB ports and includes six device connectors, a cable and an LED flashlight

  • 20000mAh capacity keeps phones running for days
  • Solar panel recharges the bank away from mains power
  • Six included connectors fit most phones and tablets
  • Built-in LED flashlight adds light during outdoor trips
  • Lithium-polymer cell stores energy in a compact form

Solar charging for off-grid use

The 4XEM 4XSOLARPWRBL is a 20000mAh lithium-polymer power bank that recharges via sunlight or USB. It targets travellers, campers and anyone who regularly operates away from wall outlets. Six bundled connectors and a cable cover a wide range of phones, tablets, GPS units, handheld consoles and e-readers.

Sustained output across multiple devices

The 20000mAh cell delivers repeated charges for smartphones and smaller tablets over several days without mains access. Solar input replenishes the bank gradually during daylight hours, extending total runtime on multi-day trips. The integrated LED flashlight draws from the same reserve, useful for campsite tasks or emergencies after dark.

Passive cooling and low self-discharge

No moving parts mean silent operation in tents, vehicles or bags. Lithium-polymer chemistry holds charge for long storage periods between adventures. The blue housing resists casual scuffs and the compact form factor fits standard daypack pockets without adding bulk.

How it compares

Measured against everything we stock in Portable Chargers & Battery Packs, at today’s prices. Recalculated every night.

Price $38.99
Pricier than about 54% of the 1,307 comparable items (median $36.99).

Specifications

Size & build
Shipping weight0.45 kg
Package size229 × 89 × 25 mm

Questions about this item

How much heat does the 20000mAh lithium-polymer cell generate when left charging in direct sunlight all day?

The lithium-polymer cell warms under normal solar charging; keep the unit out of enclosed spaces and avoid covering the panel so heat can dissipate.

Which cables or connectors must I already own to charge my phone from the built-in USB ports?

The package includes six mobile-device connectors and a charging cable; if your device uses a different plug you will need its own cable.

Will the solar panel still trickle-charge the 20000mAh bank on a cloudy day while I also run a GPS unit from the USB output?

Cloud cover reduces panel current, so simultaneous GPS use may draw more power than the panel supplies; expect slower bank recharge.

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