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Energizer

317 Energizer Button cell $1.15, 10/$9.90	357 / 303 Energizer - Watch / Electronic button cell $1.49, 10/$13.90, 25/$32.25, 50/$59.50
377 (SR626SW) silver oxide button cell, 1.55V 25mAh - Energizer $0.89, 10/$7.90, 25/$17.25	386 Energizer Button Cell $0.99, 10/$7.90
392 / 384 Energizer - Watch / Button Cell $0.89, 10/$7.90, 25/$18.75, 50/$34.50	A76 Energizer Button Cell $1.29, 10/$11.00
CR1620 $1.15, 10/$9.90	CR2025 Energizer - Watch / Button Cell $1.19, 10/$10.90, 25/$24.75, 0/$0.00
CR2032 Energizer - Watch / Button Cell $1.69, 10/$15.90, 25/$37.25, 50/$64.50	CR2450 3V Lithium button cell 560mAh - Energizer $1.99

mAh/Ah (milliampere-hour/Ampere Hour)
This is the Capacity usually expressed in mAh /Ah meaning milli-Ampere hours/Ampere hours. This is basically the amount of current the battery will give multiplied by the number of hours that it will give it for, so a bigger number means that the battery will last longer in the device you are using it for.

Think of the battery like a bucket of water, mAh or ah rating is how much water the bucket can hold the bigger the bucket (mAh/Ah ratting) the more water it can hold.(current)