What Makes the Samsung Galaxy M51 Worth Buying?
The Samsung Galaxy M51 arrived in September 2020 as a phone designed around one audacious premise: what if a mid-range device had a battery so large it could last for days? The 7,000 mAh cell is the centrepiece, but what makes the M51 genuinely compelling is that Samsung didn’t sacrifice the rest of the experience to fit it in. A Super AMOLED Plus display, a 64 MP quad-camera system, and the Snapdragon 730G chipset all share space with that massive battery — delivering a well-rounded package that still holds up as a used device.
The Super AMOLED Plus panel deserves its own moment. At 6.7 inches with 1080 x 2400 resolution (~393 ppi) and an 86.7% screen-to-body ratio, this is a genuinely immersive display. AMOLED technology means true blacks, rich color saturation, and energy efficiency when using dark themes — an important pairing with a battery-focused device. Gorilla Glass 3+ protects the front, adding meaningful scratch resistance for daily handling.
The camera system punches well above its price tier. Leading with a 64 MP main sensor (1/1.73″, f/1.8, PDAF), it captures remarkably detailed images with strong subject separation in good light. The 12 MP 123-degree ultrawide is genuinely wide — broader than many competitors’ ultrawide lenses — and the combination of 4K video recording at 30fps on both rear and front cameras is a feature that most phones in this price range don’t offer. The 32 MP selfie camera with a large 1/2.8″ sensor takes high-quality front-facing shots and shoots 4K — the kind of spec usually reserved for more expensive devices.
Reverse wired charging adds another dimension to the battery story. The M51 can charge other devices through its USB-C port, acting as a power bank for earbuds, smartwatches, or a friend’s dying phone. With 7,000 mAh to share, there’s plenty of capacity to give without significantly impacting the M51’s own endurance.
- Battery: 7,000 mAh — multi-day endurance with 25W fast charging (100% in 115 min)
- Display: 6.7″ Super AMOLED Plus at 393 ppi — vivid, detailed, power-efficient
- Main Camera: 64 MP, 1/1.73″ sensor with PDAF — exceptional detail resolution
- Selfie Camera: 32 MP with 4K video support — rare at mid-range pricing
- Rear Video:Â 4K@30fps on both rear and front cameras
- Reverse Wired Charging:Â Can top up other devices from its own battery
- NFC:Â Contactless payments supported
- Headphone Jack:Â 3.5mm retained alongside USB-C
- Storage: Dedicated microSDXC slot — no SIM slot trade-off required
Things to Know Before Choosing the Samsung Galaxy M51
The M51 is a discontinued device — the practical starting point for any buying decision. Samsung ended production, meaning new units are only available through remaining old stock or secondary market sellers. Official Samsung warranty coverage is no longer offered, and after-sales support through Samsung directly has concluded. Buyers purchasing used units should verify device condition carefully and understand that warranty protection depends entirely on the seller.
Software support has a ceiling. The M51 launched on Android 10 and was updated to Android 12 with One UI 4.1 — two major OS upgrades. That’s a reasonable run for a mid-range device, but it’s now several Android versions behind current. Security patches from Samsung are no longer active for this model, which is relevant for buyers who handle sensitive data, banking apps, or enterprise accounts on their personal device.
At 213 grams and 9.5mm thick, the M51 carries the physical reality of its enormous battery. It’s noticeably heavier than most smartphones and slightly thick by modern standards. For some users this translates to a reassuringly solid feel; for others it becomes fatiguing during extended one-handed use or slips awkwardly in slim pockets. Handling one before purchasing — if possible — is worthwhile.
The Snapdragon 730G is a capable chip for everyday tasks and even moderately demanding games, but its 8nm process and Adreno 618 GPU show their age with the most graphically intensive titles at high settings. Performance for social media, streaming, navigation, photography, and casual gaming remains smooth. The plastic back and frame, while keeping weight from climbing even higher, don’t have the premium feel of glass or metal builds — the Gorilla Glass 3+ front is the only glass surface on the device.
The 5 MP macro lens is the weakest camera in the quad array — adequate for close-up shots but limited in detail and versatility compared to the other sensors. The auxiliary lens fills out the quad count without substantially adding to creative flexibility. These are minor points given the strength of the main and ultrawide cameras, but worth noting for anyone who specifically relies on macro photography.
Is the Samsung Galaxy M51 Right for You?
The M51 was built around a clear value thesis: maximum battery life, a great AMOLED screen, and a capable camera system for a mid-range price. On the used market today, that combination still makes a strong case for specific buyer types.
Heavy battery users are the natural audience. Travelers on long journeys, remote workers, commuters with no charging access during the day, or anyone who’s simply tired of watching their phone die by early afternoon will find the 7,000 mAh cell transformative. Two full days of heavy use is genuinely achievable, and lighter users can push well beyond that between charges.
Content creators and social media enthusiasts who prioritize camera quality over all else will appreciate the 64 MP main camera’s detail output, the 12 MP ultrawide’s breadth, and — perhaps most distinctively — 4K selfie recording. At the used prices the M51 commands today, getting a 32 MP 4K-capable front camera is exceptional value.
Media consumers who spend hours streaming video, browsing social platforms, or reading on-screen will love the 6.7-inch Super AMOLED Plus display. The combination of screen size, AMOLED vibrancy, and the battery capacity to sustain long viewing sessions is hard to beat at this price tier on the secondhand market.
The M51 is less suitable for buyers who need current Android security support for work or sensitive data use, mobile gamers chasing maximum GPU performance, or anyone who dislikes larger and heavier phones. Students comparing fresh budget options may find newer devices with better software longevity at comparable prices.
Best Alternatives to the Samsung Galaxy M51
Buyers who want to weigh their options will find these alternatives worth considering:
- Samsung Galaxy M52 5G: The direct successor with 5G support, a lighter and thinner build, a 120Hz Super AMOLED display, and a more efficient chipset — the natural upgrade path for M51 fans who want a newer device.
- Samsung Galaxy F62: Shares the same 7,000 mAh battery in a slightly updated package with an Exynos 9825 chipset and Super AMOLED Plus display — similar battery DNA with a different processor architecture.
- Motorola Moto G Power (2022): A battery-focused mid-ranger with a 5,000 mAh cell, clean Android experience, and active software support — better for buyers who want current software over maximum capacity.
- Xiaomi Redmi Note 11 Pro: Strong camera specs, a 67W fast-charging 5,000 mAh battery, and AMOLED display at a competitive used price — better charging speed if endurance matters less than refill speed.
Samsung Galaxy M51 Frequently Asked Questions
How long does the Samsung Galaxy M51 battery last?
The Galaxy M51’s 7,000 mAh battery is among the largest ever fitted into a mainstream Android smartphone. Under heavy use — hours of streaming, social media, photography, and navigation — it typically lasts a full two days. Light to moderate users regularly see three days or more between charges. When the battery does need topping up, the 25W fast charger brings it from zero to 100% in approximately 115 minutes, which is reasonable given the enormous capacity.
Can the Samsung Galaxy M51 charge other devices?
Yes. The Galaxy M51 supports reverse wired charging, which allows it to pass power to other devices through its USB-C port using an appropriate cable. With 7,000 mAh of its own battery to draw from, it can meaningfully top up earbuds, smartwatches, or other phones without significantly impacting its own endurance. It essentially functions as a portable power bank when needed, without requiring a separate accessory.
What is the latest Android version the Samsung Galaxy M51 supports?
The Galaxy M51 was updated to Android 12 with One UI 4.1, which is the final major OS version Samsung delivered for this model. It launched on Android 10 and received two major upgrades. As a discontinued device, active security patches from Samsung are no longer being issued. Buyers should factor in the aging software support when assessing the phone for uses involving banking apps, sensitive accounts, or enterprise security requirements.
Does the Samsung Galaxy M51 have a good camera for the price?
The Galaxy M51’s camera system is genuinely strong for its price class, especially on the used market. The 64 MP main sensor (1/1.73″) captures highly detailed images with good dynamic range in daylight. The 12 MP 123-degree ultrawide is one of the broader ultrawide lenses available at this tier. Both front and rear cameras record 4K video at 30fps — a capability that many competitors in the same price range don’t offer. The 32 MP selfie camera is a particular standout, delivering sharp, high-resolution front-facing photos and 4K video that rivals more expensive devices.
Does the Samsung Galaxy M51 have NFC for contactless payments?
Yes. The Galaxy M51 includes NFC, enabling contactless payments through compatible apps like Google Pay, as well as NFC tag reading and device pairing. The side-mounted fingerprint scanner provides quick biometric authentication for payment confirmation, making tap-to-pay a smooth and fast experience. NFC inclusion at this price segment — particularly in a battery-focused device — was a notable feature when the M51 launched.