A recent leak reveals that a mid-range phone equipped with a massive 10000mAh battery is currently undergoing testing. It may launch in the first half of 2026. If the report holds, it would mark the debut of the first mainstream handset to feature a five-digit battery capacity. While the brand behind the device remains unnamed, speculation points to Realme. As it is known for previously teasing a concept phone with a similar 10,000mAh battery setup. So, here is everything you need to know about this.
10000mAh Battery Phone: How Is It Possible?
The emergence of ultra-high-capacity batteries is being driven by advancements in silicon-carbon negative electrode technology.
Unlike conventional graphite-based batteries, which top out at roughly 372mAh per gram, silicon-carbon variants can theoretically achieve capacities as high as 4,200mAh per gram (according to MyDrivers). This leap in energy density enables manufacturers to extend battery life significantly—without needing to make the battery physically larger.
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While an official launch date remains unconfirmed, the increasing number of leaks suggests that a 10000mAh battery phone could be closer than we think. What’s even more impressive is that the source claims the phone is just 8.5mm thick—comparable to many of today’s typical smartphones.
Who Will Be The First One To Launch This Phone?
Realme’s concept battery features a 10 percent silicon ratio and boasts an impressive energy density of 887Wh/L, one of the highest in the industry. This innovation hints at a future where large-capacity batteries can be housed in sleek, compact designs. Thus, we can expect Realme to launch a 10000mAh battery phone first.
Though it may seem hard to believe, smartphones with sizable silicon-carbon batteries are already on the market in China, showcasing slim profiles. For example, the Honor Power packs an 8000mAh battery into an 8mm thick chassis.
If Realme, or another brand, brings a similar device to global markets, it could spark a new trend of ultra-high-capacity smartphones that prioritize both battery life and slim design.
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