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Rectangular dark blue power bank with solar panels and carabiner

No Sew

No Sew PS21K 20000mAh power bank Dark Blue

SKU CH-A3D7-KZJW4 MPN PS21K

A 20000mAh lithium-polymer power bank with USB-C, Micro USB, dual LED flashlights and dust-resistant construction

  • Total capacity20,000 mAh
  • Compatible phone brandsTablet
  • Compatible phone modelsTablet
  • Battery chemistryLithium polymer
  • Voltage3.7 V
  • Amperage3 A
  • 20000 mAh capacity keeps devices running for days
  • Built-in foldable solar panels recharge from sunlight
  • Three output ports charge phone, tablet and watch together
  • Dual LED flashlights reach 15 metres with SOS mode
  • Dust-resistant shell survives outdoor knocks and grit

High-capacity portable charger

The No Sew PS21K power bank stores 20000mAh in a lithium-polymer cell and supplies power through USB-C and Micro-USB ports. It is built for travellers, campers and commuters who need multiple device charges away from wall sockets. Dust-resistant construction helps it survive bag carry and outdoor use.

Thermals and power behaviour

The pack delivers up to 3A at 3.7V through its wired outputs and accepts the same current when recharging via either port. Integrated circuitry manages heat during fast-charge sessions so the unit stays comfortable to hold. No active cooling is fitted, so sustained loads run silently.

Solar and lighting extras

Four fold-out solar panels can replenish the battery in roughly 12 to 15 hours of direct sunlight, letting you top up while hiking. Two built-in LEDs throw light up to 15 metres and switch between standard, SOS and strobe modes for emergency signalling. A carabiner clip secures the bank to a pack for charging on the move.

How it compares

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

Price $19.99
Cheaper than about 91% of the 1,307 comparable items (median $36.99).

Specifications

Product
Brand nameNymzixt
Model namePS21K
Total capacity20,000 mAh
Product type20,000 mAh
Product colorDark Blue
Ports & slots
Output typeUSB Type C, Micro USB
InputUSB Type C, Micro USB
Power
Battery chemistryLithium polymer
Voltage3.7 V
Amperage3 A
Size & build
Measurements5.6 in × 0.84 in × 2.9 in
Product weight0.66 lb (0.3 kg)
Compatibility
Compatible phone brandsTablet
Compatible phone modelsTablet

Questions about this item

How do I charge the power bank itself, and which input port do people forget to use?

Plug a USB-C or Micro-USB cable into the matching input port; many users only try USB-C and miss the Micro-USB option.

What part will wear out first and need replacing?

The internal 20000mAh lithium-polymer cells lose capacity after repeated cycles; the unit is sealed so the whole bank is replaced.

What limit appears first during continuous charging of three devices?

The 5V/2.4A total output ceiling is reached before the 20000mAh reserve runs low.

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