Dentsing AP13J3K AP13J4K 45Wh Laptop Battery Compatible with Acer

In this review the Dentsing AP13J3K AP13J4K 45Wh laptop battery is evaluated as a practical replacement for aging Acer 11.6' Chromebooks. The bottom line: it is a straightforward swap that restores original run time for users who need a cost-effective, full-capacity replacement. Our review found the battery delivers the expected 11.4V / 45Wh performance, is easy to install in compatible models, and comes with a 30-day refund and 12-month warranty that provides extra reassurance for buyers.

Key Features

• Compatibility: Works with Acer Chromebook 11.6' C720P, C740 and CB3-431-C5EX series so buyers with those models can expect a direct replacement.
• Capacity and Voltage: The 45Wh (3990mAh) capacity at 11.4V restores original battery life on systems designed for this specification.
• Connector length note: Includes a 2.5cm short cable which fits laptops that require that specific cable length and prevents loose fit issues.
• Warranty and support: The package includes a 30-day refund policy and a 12-month warranty, offering peace of mind for buyers who need reliable after-sale help.
• Simple package: Ships with one battery and one instruction sheet so users have what they need for a straightforward replacement.

Who It's For

The Dentsing AP13J3K battery is aimed at owners of compatible 11.6' Acer Chromebooks who need to replace a worn or failing battery without upgrading the whole machine. It is especially useful for people who want the original charging behavior and full-capacity runtime on older devices.

It is not for Chromebook owners whose battery cable is 4cm or 6cm long, or for users of Acer Chromebook 15 CB3-532 series, as the short 2.5cm cable will not reach. Also, those seeking brand-new OEM packaging or model variants not listed should verify the battery model and shape before purchasing.

Pros & Cons

Pros

• Restores original battery life and charges at the expected rate on compatible machines.
• Easy installation noted by multiple customers, making it accessible for DIY replacements.
• Comes with a one-year warranty and a 30-day refund window for buyer protection.
• Compact black design matches the laptop interior and fits models listed by part number.

Cons

• Short 2.5cm cable limits compatibility; it will not fit laptops requiring longer 4cm or 6cm cables.
• Value impressions are mixed among buyers, so some may find aftermarket pricing variable.

Specifications

Item Model	AP13J3K / AP13J4K
Battery Type	Li-ion
Voltage	11.4V
Capacity	45Wh / 3990mAh
Compatible P/N	AP13J3K, AP13J4K, KT.00304.001, KT.00303.001, KT.00303.011
Cable Length	2.5cm short cable (confirm fit before purchase)
Package Includes	1 battery and 1 instruction sheet

Our Verdict

The Dentsing AP13J3K battery is a sensible, budget-friendly replacement for the specified Acer Chromebook 11.6' models and restores original runtime for older machines. Buyers should confirm the short 2.5cm cable fits their laptop, but for compatible devices it represents good value backed by a 12-month warranty and easy installation.

Frequently Asked Questions

Will this battery fit my Acer Chromebook?
Check your current battery model and the cable length; it fits C720P, C740 and CB3-431-C5EX series with a 2.5cm cable but not models requiring 4cm or 6cm cables.

What is included in the package?
The package contains one replacement battery and one instruction sheet to guide installation.

What warranty and returns are offered?
The battery includes a 30-day refund window and a 12-month warranty for defects and support.