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Black rectangular lithium-ion laptop battery with connector pins

Beisite

Beisite AP16M5J laptop battery 7.7V 37Wh for Acer Aspire 3 A314-31 A315-21 A315-51 ES1-523

SKU CH-ME8H-FF983

Lithium-ion 7.7V 37Wh replacement battery compatible with Acer Aspire 1, 3, 5 and ES1 models

  • Battery typeLithium-Ion
  • Battery voltage rating7.7 V
  • Battery capacity37 Wh
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Acer Aspire 3 A314-31 A315-21 A315-51 ES1-523
  • 37 Wh lithium-ion cell keeps the laptop running longer
  • 7 V rating matches the original specification for stable power
  • Replaces 16 Acer part numbers including KT.00205.004 and KT.00205.005
  • Fits Aspire 3 A314-31, A315-21, A315-51 and ES1-523 models
  • Brand-new battery supplied as a single unit ready to install

What this battery replaces

The Beisite AP16M5J is a new lithium-ion laptop battery rated at 7.7V and 37Wh. It matches part numbers KT.00205.004, KT.00205.005 and a long list of Acer OEM codes. The pack is built for Aspire 1 A114-31, Aspire 3 A314-31, A315-21, A315-51, Aspire 5 A515-51 and ES1-523 models.

Physical fit and daily use

The black battery housing uses the original mounting points so it seats securely in the laptop chassis without adapters. Its lithium-ion cells deliver the same voltage and capacity as the factory unit, meaning charge behaviour and runtime stay consistent. One battery is included in the package.

The spec that confirms compatibility

Voltage must read 7.7V and capacity 37Wh for the battery management system to report levels correctly. If your service tag shows a different voltage or watt-hour rating, this pack will not calibrate properly. Buyers needing a higher capacity or a different voltage should look for the matching OEM specification.

How it compares

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

Price $27.99
Cheaper than about 56% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameAP16M5J
Model nameAP16M5J
Part numberKT.00205.004
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating7.7 V
Battery capacity37 Wh
Compatibility
Compatible withFor Acer Aspire 3 A314-31 A315-21 A315-51 ES1-523

Questions about this item

Does the 7.7 V output match the original Acer battery voltage?

Yes, the 7.7 V rating matches the factory specification for the listed Aspire models.

Will this pack fit inside an Acer Aspire 3 A315-21 chassis?

The battery is designed for the A315-21 series and aligns with the original mounting points.

How do I install the AP16M5J, and what step do people skip?

Power off, disconnect the AC adapter, remove the base cover, unplug the old pack, connect the new one, then reassemble; many forget to reconnect the battery cable before closing the case.

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