Nokia BLC-2 1220 Compatible Battery 3.7V 1100mAh Li-ion

Nokia 1220 / 1260 Series — 3.7V Li-ion Replacement Battery (BLC-2)

This is a 3.7V, 1100mAh Li-ion cell replacing the BLC-2, BLC-1, and BMC-3 batteries across the Nokia 1220, 1221, 1260, 1261, and over 30 additional compatible models. These are early-2000s candybar phones used for basic voice and messaging. Install this cell when the original no longer holds enough charge for a full day of normal standby and calling use.

• Cross-model fit — 1220, 1221, 1260, 1261 and more: These models share the same battery bay dimensions, connector pin layout, and 3.7V single-cell architecture. The BLC-2, BLC-1, and BMC-3 part numbers are interchangeable across this platform — Nokia standardised the footprint across multiple handset variants in this generation.
• Bench tested on actual hardware: We cycled this cell on a Nokia 1260 and monitored charge termination. The cell accepted a full charge from the original Nokia desk charger without thermal runaway, and the protection circuit tripped correctly at the low-voltage cutoff threshold during a controlled deep discharge.
• Fuel gauge recalibration after install: Run one complete discharge-to-charge cycle before relying on the battery indicator. The phone's fuel gauge IC was calibrated to your old, degraded cell. One full cycle lets it re-map the discharge curve against the new cell and report accurate charge levels.

Why the Nokia 1260 shuts off suddenly while the indicator still shows charge

This happens when the original cell has aged to the point where its internal resistance spikes sharply under load. Even with the indicator showing 20–30% remaining, the cell voltage collapses below the shutdown threshold the moment the modem draws current during a call. The phone's protection circuit reads this as a fault and cuts power immediately. A new cell with lower internal resistance sustains voltage under that same load, eliminating the mid-use cutoff.

Phone won't power on after sitting in a drawer for months

Li-ion cells self-discharge during storage. If the original battery dropped below approximately 2.5V, the battery's protection circuit locked out to prevent damage — and the phone will not respond to a charger or the power button. Connect the phone to a charger and leave it for at least 30–60 minutes without pressing anything; some chargers trickle current into a locked-out cell and slowly recover it above the re-enable threshold. If the original cell does not recover past 3.0V, it will not hold a stable charge and replacement is the correct fix.