Rechargeable flashlights can be connected directly to the outlet, and many models can even be charged by car or truck cigarette lighter. These flashlights can be used after charging the car and are particularly perfect for the first aid kit for the vehicle. Most car dealers are likely to ignore the activation of the flashlight before they need, in his or her favorite street, later in the evening, they can revive the flashlight or use it to repair tires or other car problems.

Rechargeable flashlights may also have rechargeable batteries. These rechargeable batteries are typically charged by a unique charger connected to a frequency divider socket. In order to extend battery life, it is usually best to use out the power in the battery before restoring, but if the flashlight is used as part of a crisis, it is desirable to charge the battery to the maximum after each use so that the flashlight can be used as Dealing with a part of the crisis, such as a power outage. The owner of this rechargeable flashlight may need to consider getting an extra battery so that the rechargeable flashlight can be used for several hours. This gives the true sense of silence, because a real crisis may mean a rather long power outage, not a few hours.

As for Tank007 most powerful rechargeable flashlight, here, I would like to recommend RC11, which can emit 2000 lumens light. Some key features are as follow:

RC11 is a rechargeable flashlight with three high-power LED lights. It features in scientific design, exquisite workmanship; 400-meters throw beam and up-to-2000 Lumens. This flashlight is the best choice for police, searching, outdoor and camping use.
The top with an attack-head design is made of 304# stainless steel. This makes the flashlight more durable, practical, beautiful and also tactile appeal.
A charging port in the end is protected by a water-proof metal ring. Rotate the metal ring to cover the charging port when it is not charged. This can further protect the flashlights from water.

For more details, go to: http://www.tank007.com/product/rc11/