Version: (make sure you are on the latest version before reporting):

• Minecraft: 1.18.2
• Quilt: 0.17.0
• Powah: 3.0.1

Issue description:

Put a battery with 100,000 E into a Nitro-tier Energy Discharger, it will discharge 80,000 E in a single tick but 20,000 E will stay in the battery. I'd expect the battery to fully discharge.