The Battery is a reference to its batteries or cannons. Groups of batteries combined for field combat employment called Grand Batteries by Napoleon. Supercapacitors bridge the gap between conventional capacitors and rechargeable batteries. Some attacked nearby gun batteries of the Grande Battery. Chargers for car batteries come in varying ratings. Lithium iron disulfide batteries are intended for use in equipment compatible with alkaline zinc batteries. The current IEC standards for portable primary (non-rechargeable) batteries bear the 60086 number. This may improve energy density and safety of lithium batteries and electrochemical capacitors. All run on 9 volt batteries or power adapters. The ESX III used lithium ion batteries. The system is a set of two devices running on 7.5 volt batteries. Dynamos were invented as a replacement for batteries. Most families use candles or flashlights powered by batteries or hand cranks. Laptops with this feature scan for security chips that only ThinkPad-branded batteries contain. This is equivalent to one pack of four AA batteries a day.