How Long to Charge a DSLR Camera Battery (7.2V, 1,800 mAh)?
Charging a DSLR Camera Battery (7.2V, 1,800 mAh) from empty to full takes about 1 h 13 min with its standard 15W charger. The battery holds roughly 13 Wh, and this page estimates the time for every common charger wattage, using the Lithium-ion (Li-ion / Li-Po) chemistry it actually uses.
Charge time calculator for DSLR Camera Battery (7.2V, 1,800 mAh)
Estimated charge time
1 h 13 min
Includes the slower li-ion taper phase above 80%.
Charge time by charger wattage
| Charger | Power | Full charge (0-100%) |
|---|---|---|
| Standard charger | 8W | 2 h 18 min |
| Fast charger | 15W | 1 h 13 min |
| USB-C dual-bay charger | 18W | 1 h 1 min |
Battery capacity: 13 Wh · Chemistry: li-ion
Mid-range DSLR cameras depend on proprietary lithium-ion batteries that strike a balance between capacity and weight, making them ideal for both studio work and field shooting. These batteries power everything from burst mode and continuous autofocus to viewfinder backlighting and wireless connectivity, so proper charging and maintenance directly impact your ability to capture moments without unexpected power loss. Unlike older battery chemistries, modern lithium-ion cells used in DSLR applications are designed to handle partial charges and occasional top-ups throughout the day without memory effect, giving photographers flexibility in their charging routines.
To extend the lifespan of your DSLR battery, avoid allowing it to fully discharge before recharging, and store it in a cool, dry environment when your camera sits unused for extended periods—heat and moisture are enemies of lithium-ion longevity. Many photographers benefit from rotating between two or more batteries, which distributes wear cycles and ensures backup power is always available for important shoots. Always use the manufacturer's official charger or a certified third-party unit, as unauthorized chargers may damage cells or create safety hazards with lithium-ion chemistry.
With the fastest charger listed here (USB-C dual-bay charger, 18W) it takes about 1 h 1 min. With the slowest (Standard charger, 8W) it takes about 2 h 18 min. A typical proprietary lithium-ion battery for mid-range DSLR cameras.
Frequently asked questions
- How long does it take to charge a DSLR Camera Battery (7.2V, 1,800 mAh)?
- From 0% to 100% with the standard 15W charger, it takes about 1 h 13 min. Using a faster charger shortens that; using a weaker one extends it, see the table above for exact numbers.
- Why does my DSLR battery seem to drain quickly even when the camera is powered off?
- Lithium-ion cells naturally self-discharge over time, and proprietary batteries often include internal circuitry that consumes small amounts of power to monitor cell health and communicate with your camera. Additionally, some DSLR models maintain a low-power state to preserve settings and clock data. If drainage seems excessive (noticeable loss within days), your battery may be aging, or the camera itself may have a parasitic power draw—test with a fresh battery to compare.
- Is it safe to leave my DSLR battery on the charger overnight?
- Modern lithium-ion chargers include safety circuits that prevent overcharging by cutting power once the battery reaches full capacity, so occasional overnight charging is generally safe. However, routinely leaving the battery on the charger in warm environments can accelerate aging and reduce overall cycle life. For the healthiest battery longevity, unplug the charger once charging is complete, and avoid charging in hot locations such as direct sunlight or near heating vents.
- How is this charge time calculated?
- We divide the energy needed (13 Wh times the percentage you're charging) by the charger's effective power, which is the charger's wattage times the battery chemistry's real-world charging efficiency (85% for Lithium-ion (Li-ion / Li-Po)). The same formula powers both this page and our API.
ChargeTimeCalculatorestimates are based on typical charger efficiency and battery chemistry, not a live connection to your device. Always follow your manufacturer's charging guidance.