By definition, a battery's ampere-hour rating refers to the amount of charge it can store. The higher the Ah, the greater its capacity — similar to how a bigger cookie jar holds more cookies. 0 Ah / 8000 mAh replacement battery for Makita compatible BL1860B BL1850B BL1840 BL1830 BL1815 BL1845 BL1890 BL1415 BL1430 BL1440 BL1835 194205 -3 LXT-400 with LED tool battery. Think of it like water pressure. A pressure washer at high pressure can. When cordless power tool brands switched to Li-ion battery technologies, they spec'ed and advertised batteries according to two fundamental characteristics – voltage and charge capacity, with units of volts and amp-hours, respectively. Voltage is a widely-understood concept, and amp-hours less so. Quality batteries include smart Battery Management Systems (BMS) that track status live to stop overcharging, overheating, and short circuits. Volts on Cordless Tools: What's the Difference? One of the biggest misconceptions about cordless tool batteries is that Ah (amp-hours) and volts (V) are the same thing —but they serve completely different purposes. Every power tool battery is built from individual lithium-ion cells wired together. The type and size of those cells determines everything: how much energy the pack holds, how fast it can deliver power, how much heat it generates, and how long it lasts before wearing out.
