About this replacement
Canon EOS 450D / Rebel XSi / 1000D — 7.4V Li-ion Replacement Battery (LP-E5)
This is a 7.4V, 1080mAh Li-ion cell built to the LP-E5 footprint for the Canon EOS 450D, EOS Rebel XSi, EOS 1000D, and EOS Kiss X2. It fits the camera's OEM battery slot and communicates with the body's battery management system. Use it in-body or charge it via an LP-E5 compatible charger.
- EOS 450D / 1000D platform fit: These bodies share the same LP-E5 contact layout, voltage rail, and BMS handshake protocol. One cell type covers the full range — no adapter or rewiring needed.
- Bench tested on actual hardware: We cycled this cell through the EOS 450D body and an OEM LP-E5 charger. The BMS accepted the cell, reported charge state correctly, and the protection circuit tripped cleanly at low-voltage cutoff without locking the body.
- First-cycle charging on EOS bodies: Canon's BMS on these bodies calibrates the battery-remaining display during the first charge cycle. Run the first charge inside the camera body or OEM charger — not a generic USB adapter — so the indicator maps accurately from the start.
Why the EOS 450D shows a dead battery indicator on a partially charged replacement cell
Canon's LP-E5 BMS reads voltage curves to estimate remaining charge. A new third-party cell has a slightly different discharge curve than the OEM cell the body was calibrated against. On first install, the body may misread the state of charge and flag a low or dead battery even when the cell holds a full charge. One complete charge cycle — started and finished inside the camera body or OEM charger — re-maps the indicator to the new cell's curve. After that cycle, the display tracks accurately.
Battery percentage jumping erratically mid-shoot
This happens when the body's voltage-threshold table doesn't match the new cell's discharge profile. The EOS 450D reads percentage from discrete voltage steps — if the cell drops through those steps faster or slower than expected, the display jumps instead of stepping down smoothly. It is a display calibration issue, not a cell fault. Charge the battery fully, shoot it down to near-empty once, then recharge to 8.0–8.4V fully — the body re-anchors its threshold map after one full discharge-recharge cycle.