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Black rectangular lithium-ion laptop battery with connector pins

Beisite

Beisite AP16B4J 7.6V 37W laptop battery for Switch Alpha 12 SA5-271

SKU CH-CTHB-GHTB9

Replacement lithium-ion battery delivering 7.6V and 37W for Acer Switch Alpha 12 and Switch 5 models

  • Battery typeLithium-Ion
  • Battery voltage rating7.6 V
  • Battery capacity37 W
  • Product colorBlack
  • Product typeBattery
  • Compatible withFor Switch Alpha 12 SA5-271 SA5-271P SW512-52-513B Series
  • Direct replacement for Switch Alpha 12 SA5-271 series
  • 6 V lithium-ion cell delivers 37 W capacity
  • Replaces original part numbers AP16B4J, KT.00204.003 and 21CP4/78/104
  • Compatible with numerous Switch 5 SW512-52 sub-models
  • Brand-new battery supplied in black finish

What this battery replaces

The Beisite AP16B4J is a 7.6V 37W lithium-ion replacement battery built for Acer Switch Alpha 12 SA5-271 and the extensive SW512-52 series. It matches part numbers AP16B4J, KT.00204.003, NT.LCDAA.014, NT.LCDEK.002 and 21CP4/78/104. The black pack is brand new and rated for 12 months.

Who should buy this and who should not

Owners of the listed Switch Alpha 12 or Switch 5 models needing a direct voltage and capacity match will find this pack fits the original bay. Buyers with other Acer lines, different voltage requirements or higher capacity demands should look elsewhere.

The specification that decides fit

The 7.6V 37W rating is the single figure that determines whether this battery will work in your device; verify your original battery shows the same voltage and wattage before ordering.

How it compares

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

Price $44.99
Pricier than about 77% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameAP16B4J
Model nameAP16B4J
Part number21CP4/78/104
Product colorBlack
Product typeBattery
Power
Battery typeLithium-Ion
Battery voltage rating7.6 V
Battery capacity37 W
Compatibility
Compatible withFor Switch Alpha 12 SA5-271 SA5-271P SW512-52-513B Series

Questions about this item

Does the AP16B4J battery come in other voltages or capacities for the Switch Alpha 12?

No — this replacement is only offered as a 7.6 V, 37 Wh lithium-ion pack in black.

What runtime can I expect from the 37 Wh rating in daily use?

The 37 Wh capacity typically delivers several hours of mixed workload on the Switch Alpha 12, varying with screen brightness and CPU load.

Which connector standard does the AP16B4J use and does it limit charging speed?

It uses the original equipment connector for the Switch Alpha 12 series, so charging current is governed by the laptop's own power circuitry.

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