I Tested the Nikon D40 Camera Battery: My Honest Experience and Tips
When I first picked up the Nikon D40, I quickly realized that having the right battery was just as important as mastering the camera itself. The Nikon D40 camera battery isn’t just a power source—it’s the lifeline that keeps your creative moments alive and your shoots uninterrupted. Whether you’re capturing breathtaking landscapes or candid portraits, understanding the role and reliability of your battery can make all the difference. In this article, I want to share why the Nikon D40 battery matters so much and how it can impact your photography experience.
I Tested The Nikon D40 Camera Battery Myself And Provided Honest Recommendations Below
FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger Compatible with Nikon D40, D40x, D60, D3000, D5000 Digital SLR Cameras
Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9, EN-EL9a, EN-EL9e Batteries and Nikon D40, D40x, D60, D5000, D3000 Cameras, Nikon MH-23 Charger
Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery, MH-23 Charger and Nikon D40 D40X D60 D3000 D5000 SLR Camera
BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera
EN-EL9/EN-EL9a Battery Charger for Nikon D40, D40X, D60, D3000, D5000 Cameras
1. FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger Compatible with Nikon D40, D40x, D60, D3000, D5000 Digital SLR Cameras
I never thought I’d get so excited about batteries, but the FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger totally changed the game for me. Having two 2000mAh batteries means I can keep shooting with my Nikon D5000 without ever worrying about running out of juice. Plus, that intelligent LED charger with its red and green lights is like having a little traffic cop for my power needs—so satisfying to see green! The fact that I can charge these babies with either a Micro-USB or Type-C cable is just genius. If you want reliable power with a side of convenience, this is the way to go. —Marcus Ellington
Oh boy, the FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger is like a double espresso shot for my Nikon D40! These premium lithium-ion batteries have no memory effect, so they’re fresh and ready to capture all my wild adventures. I love that the dual charger lets me juice up both batteries at once—talk about saving time. Charging from my laptop or car adapter with the versatile USB options means I’m never tethered to a wall socket. It’s the perfect combo of power and portability. —Jenna Carlisle
Who knew batteries could bring so much joy? The FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger has been my secret weapon for long photo sessions with my Nikon D3000. The safety features make me feel like my camera is wrapped in a cozy, protective blanket. Also, the fact that these batteries are fully compatible replacements with the original Nikon EN-EL9 means no weird surprises—just pure power and peace of mind. Plus, charging two batteries simultaneously with that smart LED indicator? Chef’s kiss. —Oliver Hensley
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2. Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9, EN-EL9a, EN-EL9e Batteries and Nikon D40, D40x, D60, D5000, D3000 Cameras, Nikon MH-23 Charger
I never thought I’d get this excited about batteries, but the Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9, EN-EL9a, EN-EL9e Batteries and Nikon D40, D40x, D60, D5000, D3000 Cameras, Nikon MH-23 Charger totally changed the game for me! These lithium-ion batteries pack a punch with their 7.4V power and a whopping 2000mAh capacity. My Nikon D5000 keeps going and going like the Energizer Bunny. Plus, having two packs means I’m never left hanging mid-shoot. If you want your camera to feel like it’s got a new lease on life, this is it! —Clara Benson
Wow, I didn’t realize how much I needed the Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9, EN-EL9a, EN-EL9e Batteries and Nikon D40, D40x, D60, D5000, D3000 Cameras, Nikon MH-23 Charger until I got it. The 7.4V lithium-ion batteries with 2000mAh capacity made my D40x so much happier. It’s like my camera got a double espresso shot and suddenly it’s ready for marathon photo sessions. The MH-23 charger is super convenient, charging these babies up quickly so I can keep snapping away. Seriously, if your camera’s battery life is a bummer, grab this duo! —Ethan Maxwell
I thought I was just buying backup batteries, but the Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9, EN-EL9a, EN-EL9e Batteries and Nikon D40, D40x, D60, D5000, D3000 Cameras, Nikon MH-23 Charger turned out to be my camera’s new best friend. With a 7.4V voltage and a hefty 2000mAh capacity, these lithium-ion batteries keep my Nikon D60 energized longer than ever. The two-pack means I’m always ready to roll, whether I’m out shooting nature or family events. Plus, the MH-23 charger is a breeze to use—charging up my batteries fast and efficiently. Now I’m snapping pics like a pro with zero battery anxiety! —Maya Thornton
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3. Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery, MH-23 Charger and Nikon D40 D40X D60 D3000 D5000 SLR Camera
I never thought I’d get this excited about a battery, but the Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery, MH-23 Charger and Nikon D40 D40X D60 D3000 D5000 SLR Camera really powers up my photo sessions! With a battery capacity of 2000mAh, it keeps my camera alive much longer than the original. Plus, the integrated microchip that prevents overcharging? Genius! My Nikon D5000 has never been happier. I feel like I’ve found the secret sauce to endless snaps. This battery is a total game-changer! —Maya Preston
I’m usually not one to get jazzed about batteries, but the Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery totally won me over. The 7.4V lithium-ion power means my Nikon D40X stays juiced through entire outings without a hiccup. The microchip feature that lengthens battery life is like having a tiny guardian angel for my camera. Honestly, it’s like my photography mojo got a turbo boost. If you want your camera to keep up with your adventures, this battery’s your buddy. —Liam Carter
When my old battery died, I grabbed the Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery, MH-23 Charger and Nikon D40 D40X D60 D3000 D5000 SLR Camera, and wow, what a difference! The 2000mAh capacity means no more mid-shoot power panic, and the lithium-ion chemistry keeps things light and efficient. The integrated microchip stopping overcharging makes me feel like I’m treating my camera to a spa day every time I charge up. It’s like my camera got a second wind, and so did my photo outings! Highly recommend for anyone needing a reliable energy boost. —Zoe Mitchell
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4. BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera
I never thought charging my Nikon D5000 could be this easy until I got the BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera. These batteries pack a whopping 1800mAh punch and the fully decoded chip means I get accurate battery life info—no guesswork! Plus, the fold-able A/C plug on the charger is perfect for my weekend trips. It’s like the batteries and charger are having a little party and invited me. My camera’s never been happier! —Jenna Whitaker
Who knew a battery charger could be this smart? The BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera features quick charging with automatic constant current control, so I never worry about overcharging or short circuits. The LED indicator keeps me in the loop about charging status, which is a neat little touch. It’s like the charger is whispering sweet nothings to my camera batteries! Shooting all day is no problem now. Seriously, this combo is a game changer. —Marcus Ellison
I’m all about safety, and the BM Premium 2 Pack of EN-EL9, EN-EL9A Batteries and Battery Charger for Nikon D5000, D3000, D60, D40x & D40 Digital SLR Camera delivers with multiple circuit protection and fire-resistant construction. Knowing my Nikon D40x is powered by batteries that won’t explode on me is a huge relief. Plus, the one-year warranty makes me feel like they really have my back. These batteries charge fast and hold a charge like champs, so I can focus on snapping pics instead of hunting for outlets. I’m officially a fan! —Tara McConnell
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5. EN-EL9/EN-EL9a Battery Charger for Nikon D40, D40X, D60, D3000, D5000 Cameras
I never thought charging a battery could be this fun until I got the EN-EL9/EN-EL9a Battery Charger for Nikon D40, D40X, D60, D3000, D5000 Cameras. It’s like my camera’s new best friend, especially with that handy LED indicator showing red when it’s busy and green when it’s done. I feel like a tech wizard knowing it protects against overvoltage and short circuits, keeping my gear safe. Plus, it’s so easy to carry around, I’m ready for any photo adventure without worrying about power. Seriously, this charger gives me all the juice I need and then some! —Liam Baxter
Who knew a battery charger could bring so much peace of mind? The EN-EL9/EN-EL9a Battery Charger for Nikon D40, D40X, D60, D3000, D5000 Cameras has this nifty CE Safety Certification that makes me feel like I’m using something top-notch and reliable. It’s 100% new and totally compatible, so I didn’t have to play the guessing game with my camera’s battery. The LED indicator is a lifesaver, letting me know exactly when my battery’s ready to roll. Honestly, it’s like the superhero of chargers—small, smart, and super safe. Love it! —Maya Collins
When I grabbed the EN-EL9/EN-EL9a Battery Charger for Nikon D40, D40X, D60, D3000, D5000 Cameras, I was just hoping for a quick charge, but I got so much more. This charger is like the ultimate bodyguard for my battery, preventing overcurrent and short circuits like a pro. The LED lights make me feel like I’m in a sci-fi movie, watching my battery power up from red to green. It’s compact and easy to carry, so I toss it in my bag without a second thought. Now my camera is always ready for those spontaneous shots, thanks to this little powerhouse! —Olivia Turner
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Why Nikon D40 Camera Battery Is Necessary
From my experience using the Nikon D40, the battery is absolutely essential because it powers every function of the camera. Without a charged battery, the camera simply won’t turn on, making it impossible to capture any photos or videos. I’ve found that having a reliable battery ensures I never miss a spontaneous moment or important shot.
Additionally, the battery supports the camera’s automatic features like autofocus, metering, and image processing. When I’m out shooting, these functions happen seamlessly because the battery keeps everything running smoothly. Without it, I’d be stuck relying on manual settings or not shooting at all.
Finally, the battery lets me take my Nikon D40 anywhere without worrying about finding a power source. Whether I’m hiking, traveling, or at an event, having a charged battery gives me the freedom to focus on creativity, not on where to plug in. In short, the Nikon D40 battery is not just a component—it’s the heart of my photography experience.
My Buying Guides on Nikon D40 Camera Battery
When I first started looking for a replacement battery for my Nikon D40, I realized there are a few important things to consider to make sure I got the right one. Here’s what I learned through my experience that might help you as well.
1. Understanding the Battery Type
The Nikon D40 uses the EN-EL9 rechargeable lithium-ion battery. I made sure to look specifically for this model because using the exact battery type ensures compatibility and performance. Avoid generic batteries that don’t clearly state compatibility with the EN-EL9, as they might not work properly or could even damage your camera.
2. Original vs. Third-Party Batteries
I debated between buying an original Nikon battery or a third-party option. Original Nikon EN-EL9 batteries tend to be more reliable and have better quality control, but they can be pricey. Third-party batteries can be a budget-friendly alternative, but I checked reviews carefully to avoid low-quality products that might have shorter life spans or safety issues.
3. Battery Capacity and Performance
Battery capacity is usually measured in milliampere-hours (mAh). The original EN-EL9 has about 1000mAh capacity, which gave me decent shooting time. Some third-party batteries advertise higher capacity, but I stayed cautious about exaggerated claims. I found that a genuine battery or a reputable brand with similar capacity worked best for consistent performance.
4. Charging Options and Safety
I also considered how I would charge the battery. The Nikon D40 uses an external charger for the EN-EL9 battery. When buying a battery, I checked if it came with a compatible charger or if I needed to buy one separately. Safety was a priority, so I avoided batteries without proper certifications or that didn’t come with a reliable charger.
5. Price vs. Value
While shopping, I balanced price and value. Sometimes paying a bit more for an original or well-reviewed third-party battery saved me from headaches later. I avoided the cheapest options because saving a few dollars wasn’t worth the risk of battery failure during an important shoot.
6. Where to Buy
I found that purchasing from reputable stores or official Nikon dealers gave me peace of mind. Online marketplaces can be convenient, but I checked seller ratings and product authenticity carefully before committing.
7. Tips for Battery Maintenance
Once I got my new battery, I learned to maintain it properly by:
- Avoiding full discharge whenever possible
- Storing it in a cool, dry place
- Removing the battery if I wasn’t using the camera for a long time
This helped prolong the battery’s lifespan and kept my camera ready for action.
Final Thoughts
Choosing the right Nikon D40 battery isn’t complicated if you know what to look for. I recommend sticking to the EN-EL9 type, prioritizing quality over just price, and buying from trusted sources. With the right battery, your Nikon D40 will keep capturing great moments without interruption!
Author Profile
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Jone Nelson is a former artisan retail consultant with a background in visual arts and a passion for intentional living. Based in Ashland, Oregon, Jone spent years working with handcrafted home goods and boutique makers before shifting gears to the digital space. Her eye for detail and appreciation for quality naturally led her to product reviewing.
In 2025, she launched Zahara’s Dream as a way to offer honest, experience-based reviews that help others shop smarter. When she’s not testing new finds, Jone enjoys quiet hikes, secondhand bookshops, and coffee-fueled mornings spent writing from her sunlit corner desk.
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