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Black rectangular lithium-ion laptop battery with label showing 15.4V 90W

Beisite

Beisite AP21A7T 15.4V 90W laptop battery

SKU CH-JD0T-RMF26

Replaces AP21A7T, AP21A8T, AP21A5T and KT0040G014 in Acer Nitro 5 AN517-55 and Predator Helios 300 PH315-55, PH317-56 with a 15.4 V 90 W lithium-ion cell

  • Battery typeLithium-Ion
  • Battery voltage rating15.4 V
  • Battery capacity90 W
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor AcerNitro 5 AN517-55 Predator Helios 300 PH315-55 PH317-
  • 4V lithium-ion chemistry delivers stable power
  • 90W capacity rated at 5845mAh supports extended sessions
  • Replaces AP21A7T AP21A8T AP21A5T KT0040G014 part numbers
  • Fits Nitro 5 AN517-55 and Predator Helios 300 PH315-55 PH317-56 models
  • 12-month warranty backs the new battery

90W 15.4V lithium-ion replacement battery

This new lithium-ion battery delivers 90W at 15.4V and replaces part numbers AP21A7T, AP21A8T, AP21A5T and KT0040G014. It fits Acer Nitro 5 AN517-55 and Predator Helios 300 PH315-55 and PH317-56 models. Buyers needing a different voltage or capacity should look elsewhere.

Runs cool with no added noise or power draw

The battery produces no fan noise and draws no AC power while the laptop runs on its charge. Thermal behaviour matches the original pack because the chemistry and voltage are identical. No external adapter is required during mobile use.

Black plastic housing with original connector layout

The black casing uses the same mounting points and connector pin-out as the factory battery, so installation needs no tools or cable routing. A twelve-month warranty covers defects. Users with other laptop series cannot use this pack.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $55.99
Pricier than about 86% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameAP21A7T
Model nameAP21A7T
Part numberKT0040G014
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating15.4 V
Battery capacity90 W
Compatibility
Compatible withFor AcerNitro 5 AN517-55 Predator Helios 300 PH315-55 PH317-56 55 Series

Questions about this item

How do I install the AP21A7T battery in my Acer Nitro 5 AN517-55 and what step is often missed?

Remove the bottom cover screws, disconnect the old battery connector from the motherboard before lifting it out, then connect the new 15.4V pack and secure it; the step people miss is unplugging the cable first.

What maintenance or replacement will the KT0040G014 battery need over time?

The lithium-ion cells degrade with each charge cycle; once runtime falls below your needs the only option is to fit a new 90W replacement pack.

What limit appears first on this 5845mAh pack during sustained heavy loads?

The 15.4V output will sag under continuous high current draw, triggering the laptop's thermal or power throttle before the cell temperature becomes critical.

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