Energizer CHPROWB4 battery charger. Charges 2 or 4 AA or AAA at a time, checks if the batteries are still rechargeable. Fuel gauge and count-down clock tells when batteries are done charging. Maximizes cycle life of the NiMH cells with built in over charge protection. Shut-off mechanism: Delta volt detection, 5 hrs timer. Sound indicators, single beep/start, double/done. Three-stage status indicators: red, charging 0-49%, amber, charging (50-99%), green, fully charged. Bad battery detection alert. If a bad battery is detected a red x will illuminate; with repetitive audible beep. Folding plug, reverse polarity protection. Primary battery detection.

• Charges: 2 or 4 AA or AAA NiMH rechargeable batteries
• Compatible with: AA and AAA NiMH rechargeable batteries
• Charge Time: 3 – 5 hours
• Plugs into AC wall for charging
• Provides a full charge
• Overcharge protection prevents damage from overcharging
• Auto shut-off voltage detection and timer
• Primary/bad battery and short circuit detection
• Battery Type: Nickel-Metal Hydride (NiMH)
• Includes:
  • 2 AA NiMH rechargeable Energizer batteries
  • 2 AAA NiMH rechargeable Energizer batteries
  • Compact battery charger

• USB rechargeable
• Charges in 5 hours
• Micro-USB input
• Use the 18650 USB battery to power the PolyTac X, ProTac 2L-X, ProTac HL-X and ProTac HL5-X