Vtin

Vtin Slim 24000mAh

Expert rating7.3 / 10

Capacity:: 24,000mAh
Form Factor:: Flat, book-style, 15mm thick
USB-C Output:: 20W PD
Weight:: 14.1 oz (400g)

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Manufacturer: Vtin Last updated: 2026-09-12

Where to buy

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Vtin Slim 24000mAh Review

If you carry a power bank in the laptop sleeve of your bag and hate the way cylindrical or block-shaped banks bulge out, the Vtin Slim 24000mAh is built flat like a paperback book specifically to slide in alongside a laptop.

24,000mAh is a solid multi-day capacity, but the reason to pick this over similarly-sized banks is the shape: at 15mm thick and flat on both faces, it lies against a laptop in a bag pocket instead of rolling around or creating an odd bulge, which most high-capacity banks (built more like bricks) don't manage.

Why Shape Is the Feature

Most power banks in the 20,000-25,000mAh range are shaped like thick bars or bricks because that's the efficient way to pack cylindrical cells. The Slim 24000mAh instead uses a flatter pouch-cell layout, sacrificing a little charging speed headroom for a shape that fits laptop bag sleeves and backpack pockets without the usual bulge.

Comparison to Alternatives

Against the INIU 140W, which prioritizes charging speed over shape, the Vtin Slim is the pick for anyone whose real complaint is 'this bank doesn't fit flat in my bag' rather than 'I need faster charging.' It has less than a third of the INIU's peak wattage but a genuinely different, flatter physical footprint.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7.3 / 10

Not the fastest bank at this capacity, but the one that actually fits flat in a laptop bag.

Best for

Carrying alongside a laptop in a bag sleeve
Commuters who want a bank that doesn't bulge in a backpack pocket
Multi-day capacity without a bulky brick shape

Not for

Fast charging (20W is modest for this capacity)
Laptop charging (well under 60W)
Anyone prioritizing charging speed over shape

Specifications

What these specs mean

Identity

Brand	Vtin

Size and portability

Weight	14.1 g

FAQs

What are the key specifications of the Vtin Slim 24000mAh (Flat Book-Style Ultra-Slim Power Bank for Backpack and Laptop Bag Carry)?

The Vtin Slim 24000mAh (Flat Book-Style Ultra-Slim Power Bank for Backpack and Laptop Bag Carry) is a power bank from Vtin. Key specs: Capacity (mAh) 24000, Capacity (Wh) 88.8, USB-C Output 20W PD (Input/Output), USB-A Output 2x 12W, Recharge Input USB-C 18W.

Who is the Vtin Slim 24000mAh (Flat Book-Style Ultra-Slim Power Bank for Backpack and Laptop Bag Carry) best suited to?

Best suited to: Carrying alongside a laptop in a bag sleeve; Commuters who want a bank that doesn't bulge in a backpack pocket; Multi-day capacity without a bulky brick shape.

What are the drawbacks of the Vtin Slim 24000mAh (Flat Book-Style Ultra-Slim Power Bank for Backpack and Laptop Bag Carry)?

Not the best fit for: Fast charging (20W is modest for this capacity); Laptop charging (well under 60W); Anyone prioritizing charging speed over shape.