Best Ultralife 9v Long Life Lithium Battery and Read Consumer Reviews
review is from: Ultralife 9v Long Life Lithium Battery (Electronics)
One Ultralife 9v has powered my portable headphone amp for almost 40 hours and it's still going strong! This is normally a 10-hour stint with a regular 9v alkaline battery. Not cheap, but I can imagine 5x normal alkaline life with these lithium powerhouses in low-drain electronics.
Price: $6.95
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