We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
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

  • ColorBlack
  • TypeBattery
  • Compatibilityfor Acer Aspire 3 A314-31 A315-21 A315-51 ES1-523
  • Battery TypeLithium-Ion
  • Battery Voltage7.7V
  • Battery Capacity37Wh
  • 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.

Highlights

  • 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

Specifications

BrandAP16M5J
ModelAP16M5J
Part NumberKT.00205.004
ColorBlack
TypeBattery
Compatibilityfor Acer Aspire 3 A314-31 A315-21 A315-51 ES1-523
Battery TypeLithium-Ion
Battery Voltage7.7V
Battery Capacity37Wh

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.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.