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Rectangular Nokia BL-4U phone battery with matte grey finish and gold contacts

Nokia

Nokia E66 BL-4U cell phone battery 1110 mAh 3.7 V

SKU CH-WFEM-AGJYK MPN E66

Replacement 1110 mAh 3.7 V battery compatible with Nokia E66, E75, 3120C, 5530, 5730, 6212, 6600, 8800 and N500 handsets

  • Compatible Phone ManufacturerNokia
  • Compatible Phone ModelE66 E75 3120C 5530 5730 6212 6600 8800 N500
  • 1110 mAh capacity keeps your phone running longer
  • 7 V standard voltage matches original specifications
  • Compatible with Nokia E66, E75, 3120C, 5530, 5730, 6212, 6600, 8800, N500
  • Brand-new BL-4U model replaces worn-out cells
  • Direct replacement for multiple Nokia handsets

Compatible Nokia models

This replacement battery fits the Nokia E66, E75, 3120C, 5530, 5730, 6212, 6600, 8800 and N500 handsets. It is a brand-new BL-4U unit rated at 1110 mAh and 3.7 V. Owners of those listed models can restore original runtime with a direct swap.

Thermals, noise and power draw

The cell operates at the standard 3.7 V nominal voltage and delivers 1110 mAh capacity. It produces no audible noise and generates only normal warmth during charging or calls. Power draw follows the phone's own management circuitry without extra load.

Bundled accessory impact

The package includes one battery and no additional hardware or software. Installing it simply restores the handset's factory power profile. No cables, chargers or firmware updates are supplied or required.

Highlights

  • 1110 mAh capacity keeps your phone running longer
  • 7 V standard voltage matches original specifications
  • Compatible with Nokia E66, E75, 3120C, 5530, 5730, 6212, 6600, 8800, N500
  • Brand-new BL-4U model replaces worn-out cells
  • Direct replacement for multiple Nokia handsets

Specifications

Compatible Phone ManufacturerNokia
Compatible Phone ModelE66 E75 3120C 5530 5730 6212 6600 8800 N500

Questions about this item

How do I fit the BL-4U into my Nokia E66 without damaging the contacts?

Power off the phone, slide the back cover off, lift the old cell by its ribbon tab, align the three gold pads on the new BL-4U with the phone’s terminals, press gently until it clicks, then replace the cover and power on.

What replacement will I need when the original 1110 mAh BL-4U no longer holds a charge?

When capacity fades, swap in another genuine BL-4U rated at 1110 mAh and 3.7 V; the same part number fits every compatible Nokia model listed.

Which limit appears first during a long call or heavy data session on the BL-4U?

The 1110 mAh capacity sets the runtime ceiling; expect the phone to shut down once the cell voltage drops below the 3.7 V nominal level under sustained load.

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