Unlock the full potential of efficient, high‑capacity charging with the Nitecore i8, an advanced battery charger thoughtfully designed for users who demand both performance and reliability in their daily routines. Whether you are a professional photographer juggling multiple camera batteries, a videographer working on location, a security officer relying on two‑way radios and body cameras, or simply an avid user of high‑drain devices such as powerful flashlights and vaping mods, the i8 delivers a smooth and dependable charging experience. By handling up to eight batteries at the same time, this charger eliminates the need for multiple separate chargers and dramatically cuts down on downtime. The result is simple: you stay powered, prepared, and ready for action.

Extensive Battery Compatibility

The Nitecore i8 is built to work with a wide variety of rechargeable battery types and physical sizes. It comfortably accommodates 3.6V and 3.7V lithium‑ion (Li‑ion) as well as IMR batteries in sizes ranging from the small 10340 up to the larger 26650. In addition, the i8 supports 1.48V Ni‑MH and Ni‑Cd batteries in common everyday sizes, including AA, AAA, AAAA, C, and D cells. This broad compatibility makes the i8 a true universal charging solution for households and workplaces alike. However, please be aware of an important limitation: the i8 is not compatible with 20700 or 21700 battery sizes. If your devices use those specific cells, you will need to consider a different charger.

Simultaneous Eight‑Slot Charging

With eight independent charging slots built into a single compact unit, the i8 allows you to charge multiple batteries at once without sacrificing safety or performance. Each of the eight slots operates autonomously, meaning you can freely mix different battery types, different capacities, and different states of charge all in the same charging session. For example, you could charge two large Li‑ion cells, three smaller Ni‑MH AA batteries, and a couple of IMR batteries simultaneously – no need to sort or separate them beforehand. This level of flexibility makes the i8 an indispensable tool for both personal use around the home and professional use in demanding work environments.

Adjustable Charging Speeds for Different Needs

Not all batteries are the same, and the i8 respects that by offering flexible charging current options. You can choose the speed that best matches your batteries and your schedule:

0.5A across all eight slots (0.5A x 8) – Ideal for overnight charging or when you want the gentlest possible treatment for smaller or older cells.
0.75A across four slots (0.75A x 4) – A balanced middle ground when you are charging a moderate number of batteries.
1.0A across four slots (1.0A x 4) – Faster charging for four batteries at once, perfect for busier days.
1.5A across two slots (1.5A x 2) – The fastest option, best suited for larger high‑capacity batteries that can accept a higher charge current without issue.

This level of flexibility allows you to prioritize charging speed when you are in a hurry, or switch to slower, gentler charging for smaller cells or older batteries that may be more sensitive to heat.

Dual USB Outputs for Added Versatility

The Nitecore i8 does more than just charge batteries. It also doubles as a portable charging station for your everyday electronics. The charger features dual USB outputs with a combined total of 5V at 2.1A. This means you can charge smartphones, tablets, wireless earbuds, smartwatches, or any other USB‑powered device directly from the i8 while it is simultaneously charging your batteries. This added versatility turns the i8 into a true all‑in‑one power hub, reducing clutter and keeping all your devices topped up from a single unit.

Advanced Safety Features Built In

Safety is at the very core of the i8's design philosophy. The charger includes multiple built‑in protection systems to give you complete peace of mind:

Overcharge Protection – The i8 automatically stops delivering power to any battery as soon as it reaches full capacity. This prevents the damage and safety risks associated with overcharging.
Reverse Polarity Protection – If you accidentally insert a battery backwards (with positive and negative terminals reversed), the charger immediately detects the error and prevents current from flowing. This protects both the battery and the charger from harm.
Short Circuit Prevention – In the rare event of a short circuit, the charger will shut down the affected slot to avoid damage or overheating.
Intelligent Battery Detection – The charger automatically identifies the chemistry of each inserted battery (Li‑ion, Ni‑MH, Ni‑Cd, etc.) and adjusts its charging parameters accordingly, selecting the appropriate mode from CC (Constant Current), CV (Constant Voltage), or dV/dt. This intelligent approach ensures optimal safety and extends the usable lifespan of your batteries.

Technical Specifications

Input: AC 100‑240V, 50/60Hz (works with standard household outlets worldwide) or DC 12V / 3A (for use in vehicles or with other 12V power sources)
Output (Battery): 4.2V ±1% for Li‑ion batteries / 1.48V ±1% for Ni‑MH and Ni‑Cd batteries
Output (USB): 5V ±5% with a total combined current of 2.1A
Dimensions: 117mm in length x 101mm in width x 134.5mm in height
Weight: 488.2 grams – this measurement excludes batteries and the power cord, giving you the weight of the charger unit alone

What's in the Box

When you open your package, you will find everything needed to start charging right away:

Nitecore i8 battery charger – the main eight‑slot charging unit
Standard USA power plug – designed for direct connection to US wall outlets
User manual – clear, step‑by‑step instructions for safe and effective operation
Scratch‑off validation serial number – allows you to verify the authenticity of your Nitecore product

Important Note

For best results and to ensure your personal safety, always follow the manufacturer's instructions when using the Nitecore i8. Please remember that batteries are not included with this charger and must be purchased separately based on your specific device requirements.

Nitecore i8 Intelligent 8 Slot Battery Charger