With a name like Pro Charger, you can expect high-performance and great savings over disposable batteries. It's possible to charge 2 or 4 AA or AAA batteries in just 3 to 5 hours.This is sleek and easy to use charger, with LED indicators and sound indicators to let you know the charging status of your batteries - whether they are empty, part charged or fully charged.This charger - which has a UK 3-pin plug built-in - will help maximum battery performance by ensuring a full charge without damaging your batteries. It also has bad battery detection alert, auto switch-off when charged, reverse polarity protection and Delta V detection.SpecificationsColour: Black Battery charge capability: AA (2) or (4) AAA (2) or (4) Charging Time (estimate): AA (NiMH) 1300-2000mAh: 3- 4 hours or 2000-2400mAh - 4-5 hours AAA (NiMH) 500-800mAh: 3-4 hours Shut-off mechanism: Delta V Detection; Timer (5 hours) Charging current: 2 or 4 x AA, 500mA; 2 or 4 x AAA, 220mA Input rating: Universal Voltage: 100-240vac, 50/60Hz, 7W Charging indication: Sound indicators - single beep/start - double/done 3 Stage status indicators: Red - Charging 0-49%; amber - charging (50-99%); green - fully Charged Typical Weight: 113 grams Dimensions (mm): H116 x L70 x W50  Reverse polarity protection (in case you put your batteries in the wrong way around): Yes Primary battery detection: YesWhat's included1 x Energizer Pro Charger (with a UK 3-pin plug built-in) 4 x AA 2000mAh NiMH rechargeable batteries (AA size is also known as LR6, HR06, MN1500 etc.)