Much like the advances in LED lighting, battery technology has also seen significant progress in recent years. Most electronic devices like cell phones, Ipods, laptops & digital cameras use Lithium Ion batteries these days. Lithium ion batteries are low maintenance, unlike most other rechargeable batteries. They don't have a "memory" and no scheduled cycling is required to prolong their life. They are long lasting and are rated for 300 to 500 charging cycles. The energy density of a lithium ion battery is about twice that of NiCad batteries. This means that you get much more energy than out of a similar sized NiCad battery. The Magicshine bike light uses a small, light-weight lithium ion battery which is capable of powering the light for 3 hours on its maximum setting (approximately 700 lumens) and about 5 hours on the low setting (+/- 400 lumens) |