Casio NP-120 Exilim Replacement Battery 3.7V 550mAh
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Casio NP-120 Exilim Replacement Battery 3.7V 550mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Casio NP-120 Exilim Replacement Battery 3.7V 550mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
550mAh
Casio Exilim EX-S200 Series — 3.7V Li-ion Replacement Battery (NP-120)
This is a 3.7V, 550mAh Li-ion cell built to the NP-120 spec. It fits the Casio Exilim EX-S200, EX-S200BK, EX-S200BE, and related Exilim compact models. If your original NP-120 no longer holds a charge, this cell swaps directly into the same battery compartment.
- EX-S200 series compatibility: These Exilim models share the same 3.7V battery rail, NP-120 form factor, and BMS handshake protocol. One cell covers the full range listed without modification.
- Bench tested on actual hardware: We cycled this cell through the EX-S200 body and an OEM Casio charger. The BMS accepted the cell on first insertion, voltage regulation held steady through full discharge, and capacity read correctly at 550mAh.
- First-cycle initialisation on the EX-S200: Run the first full charge through the camera body or OEM Casio charger rather than a third-party USB adapter. Some Exilim BMS firmware maps the battery-remaining indicator during this first charge cycle — skipping it can cause percentage display drift through the cell's early life.
Battery percentage jumping on the EX-S200 display after installing a new NP-120
The Exilim EX-S200 maps its battery indicator against the discharge curve of the original NP-120 cell. A new cell's discharge curve doesn't always align with the camera's stored voltage thresholds until it has completed at least one full charge-discharge cycle. This mismatch causes the indicator to jump — for example, showing 60% then dropping to 20% without warning. Run two full charge-to-empty cycles in the camera body to let the BMS recalibrate its threshold mapping. After that, the indicator stabilises against the new cell's actual curve.
Flash not fully recycling between shots near end of charge
The EX-S200's flash capacitor pulls a high recharge current immediately after each shot. When cell voltage drops below roughly 3.5V, that recharge current causes a brief voltage sag that the BMS registers as a low-power condition. The camera either delays the next shot or fires an undercharged flash, producing noticeably dimmer output. This isn't a faulty cell — it's the BMS protecting the circuit. Recharge the battery before the indicator reaches one bar to keep flash recycling at full output.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Casio
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My EX-S200 shows "no battery" when I insert the new NP-120 — what's wrong?
The Exilim BMS runs an authentication check on first insertion, and a new cell at partial charge can fail that check. Place the battery in the OEM Casio charger and run a full charge cycle before putting it back in the camera. Most EX-S200 bodies accept the cell cleanly after that first charger cycle. If the message persists, power the camera fully off, reinsert the battery, and power on again — a cold power cycle clears the BMS flag.
Shot count is much lower than expected even though the battery shows full charge before shooting.
Shot count drops fast when flash, continuous autofocus, and image stabilisation are all active simultaneously — these draws stack beyond what a simple shot-count spec assumes. The 550mAh rating reflects capacity under standard test conditions, not worst-case combined draw. To extend time between charges, disable optical stabilisation when shooting still subjects and reduce flash use in well-lit conditions. Checking the camera's power-saving settings in the menu also reduces idle processor draw between shots.
The battery percentage on my EX-S200 reads differently in cold weather — drops fast then recovers indoors.
Li-ion cells lose usable voltage at low temperatures because ion movement through the electrolyte slows down. The EX-S200 reads cell voltage to estimate charge remaining, so a cold-induced voltage drop shows as a steep percentage drop even if the cell is physically still charged. Bring the camera back to room temperature and the voltage — and displayed percentage — recovers. Keep the camera in an inner jacket pocket between shots in cold conditions to maintain the cell above 10°C and hold a stable voltage reading.
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