LED Lenser H14R.2 Lithium ion replacement battery pack 4400mAH 3.7v battery – UK Outdoor Store
Amazon.com: Ledlenser H14R.2 - Rechargeable Outdoor LED Head Torch, Super Bright 1000 Lumens Headlamp, Water Resistant (IPX4), Camping, Hiking Equipment, Head Torch Rechargeable, Up to 35 Hours Running Time : Sports & Outdoors