Re Battery is the IC2 entry-level 10,000 EU rechargeable LV battery, crafted from tin, insulated copper cable, and redstone.
Guide
Smelt 4 Tin Ingots, craft 2 Insulated Copper Cables (copper cable + rubber), and collect 1 Redstone Dust.
Top row: Tin, Insulated Copper Cable, Tin. Middle row: Tin, Redstone, Tin. Bottom row: empty, Tin, empty. This U-shape yields one Re Battery.
Place the Re Battery in a BatBox, basic Generator, MFE charging slot, or Charging Bench. Never feed it MV or HV current or it explodes.
Drop the charged Re Battery into the battery slot of a Mining Drill, Chainsaw, Electric Wrench, Electric Hoe, or Electric Treetap to run it.
When empty, recharge the same Re Battery again. To return stored EU to the grid, place it in the energy slot of a BatBox, MFE, or MFSU.
Keep two Re Batteries per electric tool: one in the tool and one in a BatBox charging up. The 10,000 EU buffer covers most early mining trips.
A Re Battery stores up to 10,000 EU, which is the standard tier 1 LV buffer in IndustrialCraft 2.
Only from the charging slot. Feeding MV or HV cable current straight into the battery makes it explode. Use a BatBox, basic Generator, MFE charging slot, or Charging Bench.
Any IC2 electric tool with a battery slot, including the Mining Drill, Chainsaw, Electric Wrench, Electric Hoe, and Electric Treetap.
No. Unlike the Single-Use Battery, the Re Battery is reusable and stays in your inventory after discharging.
Use an Energy Crystal (100,000 EU, MV) for medium voltage and a Lapotron Crystal (1,000,000 EU, HV) for high voltage setups.