The Single-Use Battery can store up to 1000 EU. That's 9000 EU less than the RE Battery, and you can't recharge them. However, they are much easier to produce in quantities and are easier to transport. TIP: Making RE Batteries is a more efficient for charging items, as the battery itself doesn't get destroyed on use. More than 10 units of single use batteries has better storage though. If you are late-game and need something to do with all that coal, it can be a good investment, as all ingredients to make one Single-Use Battery are easy to come by, and it's 5 batteries for each batch(8 if you hydrate your coal dust, an easy process which only requires a water bucket).
1,000 (per battery)
• Single-Use Batteries are not very efficient; an RE-Battery is more efficient because it isn't destroyed in the process of giving you EU. However, Single-Use Batteries are good for adventure maps where the player has a limited amount of energy in their possession.
• Single-Use Batteries are good if you have some leftover material, and want to get rid of it.
• Spending coal to make Single-Use batteries instead of opting to throw them in your Generator creates more total EU. One cycle of burning coal in a generator is good for 4000 EU. Creating a single batch of batteries (even if it's with unhydrated coal dust) nets 5000 EU. This does ofcourse not cover the EU cost to make the coal dust, rubber, and copper ingots, but it's almost safe to say this is negligible.