LG Energy Solution, solid-state batteries could come to smartphones about 10 years before electric cars predicts. Robert Lee, the company’s North American President, states that mass producing the large cells required for automobiles challenges the industry. On the other hand, small batteries in phones allow manufacturers to use new technology on a more limited scale. So higher energy densityfast charging and lower risk of burning may first come true in our pockets.
Solid-state batteries replace the liquid electrolyte in traditional lithium-ion cells. solid electrolyte is using. In this way, manufacturers can allocate less space for thermal control while aiming for higher capacity. Additionally, LG Energy Solution has developed its own sulfur-based all-solid-state battery. Charging in less than 20 minutes aims. The company uses this technology To launch for commercial use in 2029 and then plans to move it to electric vehicles, electric ships and energy storage systems.
Higher energy density in phones opens the door to larger battery capacity within the existing case. On the other hand, manufacturers may choose to preserve capacity and produce thinner phones. HONOR Magic V6 provides one of the current examples of this with silicon-carbon technology. The phone contains 25 percent silicon 6,660 mAh battery with 921 Wh/L energy density offers.
In addition, HONOR increased the silicon content to 32 percent in the Silicon-carbon Blade Battery prototype it showed at MWC 2026. The company is in this battery Energy density over 900 Wh/L announced and targeted the 7,000 mAh level in foldable phones. However, this technology does not use solid state batteries. Still, it clearly shows the direction mobile manufacturers are taking to store more energy in thin cases.
Small cells make it easier for solid-state batteries to come to phones sooner
As the scale of electric cars increases, production problems also increase. Especially dendrite formationcell life, temperature control, production cost and consistency between cells are among the issues that manufacturers need to solve. Despite this, BMW has begun road testing by installing Solid Power’s large all-solid-state cells into the BMW i7 test vehicle. Samsung SDI then joined the development efforts of BMW and Solid Power in October 2025.
Stellantis de Factorial’s FEST solid state cells Dodge Charger Daytona built it into its development vehicle and started road tests in June 2026. The company measures performance, safety and reliability in real driving conditions. Factorial had previously announced cells above 390 Wh/kg, and later announced the launch of its car-sized FEST cells. 375 Wh/kg and 18-minute charge from 15 to 90 percent confirmed their values. Thus, while automotive studies continue, LG Energy Solution expects smaller cells to find commercial use in phones much sooner.
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