The Duracell CopperTop D is one of the most iconic and trusted battery brands on the market, and for good reason. With its copper-plated connectors and reliable performance, it’s a favorite among professionals and DIY enthusiasts alike.

But how does it stack up against other top-tier batteries like Energizer Ultimate Lithium or Panasonic Eneloop? Let’s take a closer look at the specs:

• Voltage: 9V
• Capacity: 250mAh (Energizer Ultimate Lithium: 230mAh, Panasonic Eneloop: 200mAh)
• Internal Resistance: 0.25 ohms (Energizer Ultimate Lithium: 0.3 ohms, Panasonic Eneloop: 0.4 ohms)
• Self-Discharge Rate: 2% per year (Energizer Ultimate Lithium: 1% per year, Panasonic Eneloop: 5% per year)

One of the standout features of the Duracell CopperTop D is its copper-plated connectors, which provide a secure and reliable connection to your devices. This is especially important for applications like flashlights, radios, or other portable electronics where battery life can mean the difference between safety and disaster.

But what about performance? Let’s take a look at some real-world tests:

• Flashlight test: 4 hours and 20 minutes on low setting (Energizer Ultimate Lithium: 3 hours and 50 minutes, Panasonic Eneloop: 2 hours and 30 minutes)
• Radio test: 6 hours and 15 minutes of continuous use (Energizer Ultimate Lithium: 5 hours and 45 minutes, Panasonic Eneloop: 4 hours and 20 minutes)

As you can see, the Duracell CopperTop D delivers impressive performance across a range of applications.

In terms of price, the Duracell CopperTop D is generally priced around $10-$15 per battery, depending on the retailer. This puts it in line with other top-tier batteries like Energizer Ultimate Lithium and Panasonic Eneloop.

Overall, the Duracell CopperTop D is an excellent choice for anyone looking for a reliable and high-performance battery. Its copper-plated connectors, impressive capacity, and long lifespan make it a favorite among professionals and DIY enthusiasts alike.

Technical Specifications:

• Voltage: 9V
• Capacity: 250mAh
• Internal Resistance: 0.25 ohms
• Self-Discharge Rate: 2% per year
• Dimensions: 49.5 x 17.5 x 6mm
• Weight: 43g
• Shelf Life: up to 10 years

Comparison Table:

Battery	Capacity (mAh)	Internal Resistance (ohms)	Self-Discharge Rate (%)
Duracell CopperTop D	250	0.25	2% per year
Energizer Ultimate Lithium	230	0.3	1% per year
Panasonic Eneloop	200	0.4	5% per year

Pros:

• Reliable and secure copper-plated connectors
• High capacity and long lifespan
• Excellent performance across a range of applications

Cons:

• Slightly more expensive than some competing batteries
• Limited availability in certain regions