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Rectangular black Li-ion laptop battery pack, 15.4V 5845mAh

KingSener

KingSener AP21A7T 15.4V 5845mAh laptop battery

SKU CH-9AGV-WX6V2 MPN AP21A7T

Replacement lithium-ion battery rated 15.4V and 5845mAh for compatible Acer Predator Helios and Nitro 5 laptops

  • Battery Voltage15.4V
  • Battery Capacity5845mAh/90WH
  • 90 Wh capacity supports longer unplugged sessions
  • 4 V output matches original specification exactly
  • Compatible with Acer Predator Helios 300 PH315-55 and PH317-56 series
  • Fits Acer Nitro 5 AN517-55 and Predator Helios Neo 16 models
  • Replaces part numbers AP21A8T AP21A7T AP21A5T KT0040G014

Replacement battery for Predator Helios and Nitro 5

The KingSener AP21A7T is a 15.4 V, 5845 mAh lithium-ion pack rated at 90 Wh. It replaces part numbers AP21A8T, AP21A5T and KT0040G014 in compatible Acer notebooks. The black cell assembly ships new and carries a one-year manufacturer warranty.

Direct fit restores original runtime

Matching the factory voltage and capacity means the laptop charges to the same level and reports capacity accurately in the OS. No adapter cables or firmware updates are required; the battery seats into the existing bay and connects to the stock motherboard header.

Simple swap, watch for screw length

Remove the bottom cover, disconnect the old pack, and secure the new one with the original screws. The most common issue is reusing screws that are too long and contacting the cell pouch — verify length before tightening. Ensure the connector clicks fully seated before reassembly.

Highlights

  • 90 Wh capacity supports longer unplugged sessions
  • 4 V output matches original specification exactly
  • Compatible with Acer Predator Helios 300 PH315-55 and PH317-56 series
  • Fits Acer Nitro 5 AN517-55 and Predator Helios Neo 16 models
  • Replaces part numbers AP21A8T AP21A7T AP21A5T KT0040G014

Specifications

BrandKingSener
ModelAP21A7T
Part NumberAP21A8T AP21A7T AP21A5T KT0040G014
Battery Voltage15.4V
Battery Capacity5845mAh/90WH

Questions about this item

Will the 5845mAh Li-ion cells need replacement after a certain number of cycles?

The 5845mAh Li-ion pack is rated for typical notebook cycle life; capacity will gradually decline and a replacement is usually considered when run-time drops below useful levels.

What limit appears first during sustained discharge at 15.4V?

The 90WH capacity ceiling is reached first; continuous draw depletes the 5845mAh reserve until the pack voltage falls to the controller cut-off point.

Does the 15.4V 90WH pack generate noticeable heat or fan noise during all-day use?

The battery itself is passive and silent; any warmth or fan activity comes from the laptop's charging circuit and workload, not from the pack.

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