Compare watt-hours before milliamp-hours: our NP-BX1 compatible cell is 1090mAh / 4.04Wh, with the original NP-BX1 setting the baseline. Milliamp-hours describe charge, not energy, so they cannot be compared across voltage platforms. Watt-hours (voltage x capacity) are the honest figure. Where a label states both a typical and a minimum rating, use the minimum for conservative runtime estimates.
By CIPA standard the RX100 VII delivers about 250 shots per charge (220–330 / ZV-1 4K 45–60 min). Real-world figures fall with viewfinder use, bursts, flash and low temperature, so budgeting around 70% of the rating is safer.
Original vs our cell, item by item
The table puts the original rating and our compatible cell on the same basis. Price is the listed retail figure; check the product page for current terms. Where a minimum rating is printed, that figure is the better basis for conservative estimates.
| Item | Original | Our compatible cell |
|---|---|---|
| NP-BX1 | — | 1090 mAh |
| Wh | — | 4.04 Wh |
| mAh (min) | — | — |
| CNY | — | ¥24.57 |
Balancing capacity, price and warranty
Higher capacity does not double your shots: the body cutoff voltage and its fuel-gauge algorithm both shape the reading. For a spare cell, price, cycle life and warranty often matter more than the peak number.
| Item | Value |
|---|---|
| NP-BX1 | NP-BX1 |
| NP-BX1 | Sony NP-BX1 |
| np-bx1 | 1090 mAh / 4.04 Wh |
| RX100 VII | 250 / 220–330 / ZV-1 4K 45–60 min |
| NP-BN / NP-BN1 | NP-BX1 |
| NP-BX1 | 1090 mAh / 4.04 Wh |
Choosing a kit by shooting load
For light use, one original plus one spare is enough. For a full day of travel or video work, carry two or more and rotate them through a dual-bay charger.
To pick by model, start with the specifications and stock status on Sony NP-BX1 1090mAh, then browse the full article set in NP-BX1; if your body belongs to a neighbouring system, NP-F960 has the side-by-side explanation.
FAQ
Is 1090mAh an inflated rating?
Our NP-BX1 compatible cell is specified at 1090mAh / 4.04Wh. with the original NP-BX1 setting the baseline. Compare the Wh figures rather than mAh alone.
Should I look at mAh or Wh?
Wh. Milliamp-hours only become energy once multiplied by voltage, so comparing mAh across different voltage platforms is misleading. 4.04Wh is the like-for-like baseline for this pack.
Can a higher-capacity cell damage the camera?
No. As long as the shell, contacts and protection circuit match the system, capacity only affects runtime. The one caveat is that older bodies may report charge level inaccurately.
Should I buy one cell or two?
For a full day outside or video work, carry two or more and rotate them through a dual dock. For indoor or short sessions, one original plus one spare is enough. Budget conservatively against the RX100 VII baseline.