We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Short black power adapter cable with large square male plug on one end and small round 7.9 by 5.5mm female jack on the other

eForChina

eForChina Big Square Male 1st Gen to 7.9 x 5.5mm Female Power Adapter Cable 10cm

SKU CH-2ESZ-FPGZH

Connects a first-generation square male power plug to a 7.9 x 5.5 mm female port on a laptop using a 10 cm cable

  • Adapter typePower Adapter
  • First-generation square male to 7.9 x 5.5 mm female power adapter
  • 10 cm cable keeps laptop charging tidy and compact
  • Small, lightweight build slips into any bag
  • Brand-new condition ensures reliable power delivery
  • Simple gender changer connects legacy square plugs to 5.5 mm barrels

Square Male to 7.9 x 5.5mm Adapter

This cable converts a first-generation square male power plug to a 7.9 x 5.5mm female socket for laptop charging. It is intended for users who need to connect a legacy square-tip adapter to a device with the smaller barrel input. The 10cm length keeps the connection compact for travel or desk use.

For Square-Tip Power Supply Owners

Buyers with an original square-tip power supply who need to power a laptop that accepts a 7.9 x 5.5mm barrel jack will find this adapter useful. It is not for users whose power supply already has a matching barrel connector or who require a different output size. The cable does not change voltage or current; it only adapts the physical plug.

7.9 x 5.5mm Female Barrel Specification

The defining specification is the 7.9 x 5.5mm female barrel interface that receives the laptop power input. The square male end mates with the first-generation square power supply tip. Verify that your device requires exactly this 7.9 x 5.5mm centre-positive barrel before purchasing.

How it compares

Measured against everything we stock in Other Adapters & Couplers, at today’s prices. Recalculated every night.

Price $6.99
Cheaper than about 90% of the 1,761 comparable items (median $18.99).

New to this? Which coin should you pay with — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Adapter typePower Adapter

Questions about this item

Does the 10cm cable add any noticeable heat or power loss during all-day laptop charging?

The short 10cm length keeps resistance low, so heat and power loss are negligible during continuous use.

What must the laptop already have for this 7.9 x 5.5mm female connector to work?

The laptop needs a first-generation big square male power port that matches the adapter's input side.

Will this adapter fit an older charger tip that uses a 5.5mm outer diameter with a different inner pin size?

The female end is fixed at 7.9 x 5.5mm, so only tips with that exact inner and outer diameter will connect securely.

More in Other Adapters & Couplers

Similar items