Estry 550mAh 3.7V Lithium Battery for DSi NDSiL NDSi C/TWL-A-BP TWL-003

Direct replacement for Nintendo DSi

This Estry lithium cell matches the original 3.7 V 550 mAh specification for the DSi, DSi L and DSi C models. It fits the C/TWL-A-BP and TWL-003 battery compartments without modification. The pack weighs 38.0 g and measures 55.09 x 27.04 x 6.51 mm. Safety certifications include ISO9001, RoHS, CE, UN38.3 and MSDS.

Capacity and runtime headroom

The 550 mAh rating delivers 2.04 Wh of energy, which restores the handheld to its factory playtime between charges. Over-charge, over-discharge, over-voltage and short-circuit protection circuits help the cell hold that capacity through repeated cycles. Heavy backlight use or wireless play will drain the pack faster, so a second battery is practical for long sessions away from a charger.

Upgrade path and when to switch

This unit replaces a swollen, short-lived or non-holding original battery in any compatible DSi family console. The jump is worth it when the system shuts down early, the back cover bulges or charge cycles drop below an hour of typical play. It is not for users needing higher capacity than 550 mAh, a different voltage, or a pack that fits 3DS or 2DS models.