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Small green coin-cell CMOS battery, 20 mm diameter, 3.8 mm thick

Cameron & Co

Cameron & Co DS-CS-AC4720BU CMOS Lithium Battery 3.0V 200mAh Green

SKU CH-VR2N-82BZ5

CMOS backup battery for Acer Aspire 4720 and 4720z laptops, 3.0V 200mAh lithium cell

  • TypeBattery
  • Keeps system clock and BIOS settings alive with a 3.0 V lithium cell
  • Direct replacement for Acer Aspire 4720 and 4720z using BR1220 or CR1220 part numbers
  • Compact 20 × 20 × 3.8 mm footprint fits the motherboard socket without modification
  • Non-rechargeable 200 mAh capacity delivers reliable backup power for CMOS memory
  • Ships brand new and 100 % OEM compatible in green finish

Backup Battery for Acer Aspire 4720 and 4720z

This CMOS lithium cell supplies 3.0V and .2 Ah capacity to keep the real-time clock and BIOS settings alive when the main battery is removed. It replaces part numbers BR1220 and CR1220 in the listed Aspire models. The green battery measures 20 x 20 x 3.8 mm and is non-rechargeable.

Fits Directly Into the Motherboard CMOS Socket

No soldering or adapter cables are required; the cell slides into the existing holder on Acer Aspire 4720 and 4720z boards. It frees the system from date resets and CMOS checksum errors caused by a depleted original battery. Installation takes only a few minutes with basic tools.

Single Cell Shipped Ready to Install

The package contains one brand-new Cameron Sino DS-CS-AC4720BU battery with 100% OEM compatibility. No driver disks, configuration utilities or mounting hardware are included or needed. The cell is ready for immediate use upon arrival.

Highlights

  • Keeps system clock and BIOS settings alive with a 3.0 V lithium cell
  • Direct replacement for Acer Aspire 4720 and 4720z using BR1220 or CR1220 part numbers
  • Compact 20 × 20 × 3.8 mm footprint fits the motherboard socket without modification
  • Non-rechargeable 200 mAh capacity delivers reliable backup power for CMOS memory
  • Ships brand new and 100 % OEM compatible in green finish

Specifications

BrandCameron Sino
ModelDS-CS-AC4720BU
TypeBattery

Questions about this item

How long will the 200 mAh capacity keep the CMOS settings alive without mains power?

The 200 mAh lithium cell holds 0.60 Wh, which typically maintains BIOS data for several years in an Acer Aspire 4720 or 4720z.

Does the battery generate any heat or noise during continuous operation?

No, the non-rechargeable lithium button cell produces no audible noise and negligible heat while powering the CMOS circuit.

Which laptop models must I already own for this BR1220/CR1220 replacement to fit?

It is a direct fit for Acer Aspire 4720 and Aspire 4720z systems that use a BR1220 or CR1220 CMOS battery.

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