Samsung's new foldable phones come with larger battery capacity thanks to silicon-carbon technology, but they also introduce a shorter official lifespan. According to the European Product Registry for Energy Labelling (EPREL), the Galaxy Z Fold 8 Ultra, Z Fold 8, and Z Flip 8 are rated for 1,200 full charge cycles. After that number of cycles, the maximum battery capacity is expected to fall below 80% of its original value, which means a faster degradation compared to last year's models.
EPREL certification reveals the 1,200-cycle limit
The EPREL database is the authoritative source for battery endurance ratings in Europe. For the three new foldables, the data is clear and consistent. After 1,200 complete charge and discharge cycles, the battery retains less than 80% of its initial capacity. For someone who charges the phone once a day, that threshold arrives in just over three years. If you typically charge twice a day, the degradation will become noticeable in under two years. This is a significant shift for users who expect their premium device to last for years.
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A sharp contrast with the 2,000-cycle rating of the previous generation
The Galaxy Z Fold 7 and Z Flip 7 use traditional lithium-ion batteries and boast an endurance rating of 2,000 cycles. In other words, they are designed to keep at least 80% of their original capacity until after 2,000 full cycles. The new models therefore have a 40% shorter official lifespan. Samsung has chosen to increase the energy density of the cells to deliver larger capacity, but the trade-off is durability. A similar compromise can be seen in the iPhone 17 Pro Max, which adds a professional feature that requires more storage and processing power.
Silicon-carbon chemistry comes with both benefits and drawbacks
Silicon-carbon batteries have been requested by fans for years because they allow higher capacity without increasing the physical size of the cell. Samsung adopted this technology for the first time in its foldable lineup, and the impact on specifications is immediate. The Galaxy Z Flip 8 offers about 20% more capacity than the Flip 7, and the Fold 8 models see similar gains. However, silicon-carbon cells tend to degrade faster than conventional lithium-ion cells, especially under heavy use. The EPREL numbers confirm this trend, but they don't tell the whole story.
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The Galaxy S26 series adds another layer to the discussion
Interestingly, the Galaxy S26 series also carries a 1,200-cycle endurance rating, but those phones still use lithium-ion batteries. This suggests that Samsung may have changed its testing criteria or deliberately adopted a more conservative rating across all flagship devices. If silicon-carbon were the sole cause, the S26 would likely have kept the 2,000-cycle rating. The decision to lower the rating across the board might be related to software optimization or a new measurement protocol. Either way, the practical impact for consumers is minimal in the first few years, but those who hold onto their phones for four or five years should consider the new numbers carefully.
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Samsung is betting on silicon-carbon technology to win the battery capacity war, and the new Galaxy Z Fold 8 and Flip 8 deliver significantly more power than their predecessors. But the official 1,200-cycle rating is a clear indicator that longevity has been reduced. For average users, daily performance won't change dramatically in the short term. For long-term enthusiasts, the math is simple. A phone that loses 20% capacity after three years requires more careful battery management or an earlier replacement. Samsung must balance innovation with reliability to keep its customers satisfied.
