Review on 🔋 VONIKO Alkaline 9V Batteries - 4 Pack - Long-Lasting with a 7-Year Shelf Life by Derrick Siham

I ordered and received a set of 4 Voniko 9V alkaline batteries. I opened them up and measured the voltage across each with a good quality multimeter. Each showed exactly 9.66 volts. I was happy to see consistency in every way. I then measured the length of the batteries compared to Duracell brand batteries. As you can see from the photo, Duracell was just under 1-3/4 inches and Voniko just over 1-3/4 inches (dimensions without connectors). My Snap-On Precision Steel ruler confirms that the Voniko is just over 1/32 inch longer than the Duracell. The overall build quality of Voniko's batteries appears to be high. For those who are interested, the packaging says the batteries are made in China. The Voniko battery fits easily in my Kiddie/FireX smoke alarm, but your mileage may vary. If the standard 9V Duracell battery doesn't fit, Voniko may give you problems.