1. Introduction
This manual provides instructions for the safe and effective use of your Tenergy 10000mAh NiMH D rechargeable batteries. Please read this manual thoroughly before use and retain it for future reference.
Package Contents
- 8 rechargeable D size batteries
2. Key Features
- High Capacity: 10,000 mAh for extended device operation.
- Rechargeable: Can be recharged up to 1000 times, offering an economical and environmentally friendly alternative to disposable batteries.
- No Memory Effect: Charge batteries at any time without concerns about capacity loss due to partial discharge.
- Wide Temperature Range: Operates effectively in temperatures from -4°F to 122°F.
- Direct Replacement: Designed as an exact replacement for standard D size alkaline batteries.
- UL Certified: Ensures safety and quality standards are met.
- Eco-Friendly: Free from Mercury (Hg) and Cadmium (Cd), and recyclable.

Image: Tenergy NiMH D batteries highlighting UL certification and environmental safety (no mercury or cadmium, recyclable).

Image: A Tenergy D battery illustrating its performance across a wide temperature range, from cold (-4°F) to hot (122°F).
3. Setup and Charging
Before initial use, fully charge the batteries using a compatible NiMH battery charger. Ensure the charger is designed for D size NiMH batteries.
Charging Process:
- Insert the Tenergy D batteries into the charger, observing correct polarity (+ and - terminals).
- Connect the charger to a power source.
- Allow the batteries to charge until the charger indicates a full charge. Charging times vary depending on the charger model and battery depletion level.
- Once fully charged, remove the batteries from the charger.
Note: Due to the "no memory effect" feature, you can recharge these batteries even if they are not fully depleted without affecting their long-term capacity.
4. Operating Instructions
These batteries are suitable for a wide range of high and low drain electronic devices.
Inserting Batteries:
- Identify the battery compartment in your device.
- Match the positive (+) and negative (-) terminals of the battery with the corresponding markings in the device's compartment.
- Insert the batteries firmly.
- Close the battery compartment securely.
Recommended Uses:
- Flashlights
- Camping gear
- Clocks
- Radios
- Portable electronics
- Other household devices requiring D size batteries

Image: A Tenergy D battery positioned near a digital clock, representing its suitability for everyday household devices.

Image: A collage showing various devices like a radio, remote control, and flashlight, indicating the versatility and "high value" of Tenergy rechargeable batteries for different applications.
Video: An official Tenergy video demonstrating the value and features of Tenergy C and D NiMH rechargeable batteries, including high capacity, recharge cycles, no memory effect, and wide temperature performance. This video is provided by Tenergy Corporation.
5. Maintenance and Storage
Battery Care:
- Avoid mixing new and old batteries, or batteries of different types/brands.
- Do not expose batteries to extreme heat or direct sunlight.
- Do not short-circuit the battery terminals.
- If batteries are not used for an extended period, it is recommended to store them partially charged (around 50%) in a cool, dry place.
- Clean battery contacts periodically with a clean, dry cloth to ensure good connection.
Storage:
Store batteries in a cool, dry environment away from direct sunlight and extreme temperatures. For long-term storage, ensure batteries are not fully discharged.

Image: A Tenergy D battery surrounded by green leaves, emphasizing the environmental benefits of recharging and reusing batteries.
6. Troubleshooting
Common Issues and Solutions:
- Battery Not Charging:
- Ensure the charger is compatible with NiMH D batteries and is properly connected to a power source.
- Verify correct battery polarity in the charger.
- Some "smart" chargers may not recognize deeply discharged batteries. Try using a simpler, less intelligent charger for a short period (10-30 minutes) to initiate a charge, then transfer to your smart charger.
- Clean battery contacts and charger terminals.
- Short Operating Time:
- Ensure batteries are fully charged before use.
- The device may have a high power draw, leading to faster depletion.
- Batteries may be nearing the end of their lifespan (after many recharge cycles).
- Device Not Powering On:
- Check if batteries are inserted with correct polarity.
- Ensure batteries are fully charged.
- Verify that the device itself is functioning correctly.
7. Specifications
| Brand | Tenergy |
| Model Number | 90111 |
| Battery Cell Composition | NiMH (Nickel-Metal Hydride) |
| Battery Capacity | 10000 Milliampere Hour (mAh) |
| Voltage | 1.2V (Nominal) |
| Dimensions | 61.5mm (length) x 33mm (diameter) |
| Item Weight (per battery) | Approximately 5.8 ounces |
| Recharge Cycles | Up to 1000 times |
| Certifications | UL Certified |
| Environmental Features | No Mercury (Hg), No Cadmium (Cd), Recyclable |

Image: The Tenergy 10000mAh NiMH D rechargeable battery, showing its standard D size form factor.

Image: A Tenergy D battery with its dimensions clearly marked (61.5mm length, 33mm diameter), indicating it is a direct replacement for alkaline D batteries.
8. Safety Information
- Do not dispose of batteries in fire; they may explode.
- Do not disassemble, crush, or puncture batteries.
- Keep batteries out of reach of children and pets.
- If battery fluid leaks, avoid contact with skin and eyes. If contact occurs, rinse immediately with water and seek medical attention.
- Use only chargers specifically designed for NiMH batteries.
- Do not mix with primary (non-rechargeable) batteries or other types of rechargeable batteries.
9. Warranty and Support
For warranty information, technical support, or further inquiries, please visit the official Tenergy website or contact their customer service department. Tenergy Corporation is the manufacturer of these batteries.
Manufacturer: Tenergy
First Available Date: June 10, 2008
10. Environmental Disposal
These Tenergy NiMH D batteries are recyclable. Please dispose of them responsibly at designated battery recycling centers. Do not dispose of batteries with household waste.