Battery 411 Blog

U9VL is the model number for the Ultralife 9 volt lithium battery using a plastic housing. It is sold only in sealed foil packaging as model U9VL-FP. An advantage of the sealed foiled package, which must be torn open to remove the battery, is to be able to verify that the battery has never been used. The U9VL is designed for applications in which the battery will most likely be used fairly quickly, such as in many medical, wireless security and music/audio devices.

Ultralife U9VL-J – 9 Volt Lithium Battery, Metal Casing

U9VL-J is the model number for Ultralife long-life 9 volt lithium battery. It is actually a U9VL battery encased in aluminum housing. The aluminum housing reduces the amount of moisture that can enter the battery over time, which enhances its life. It is also slightly larger than the U9VL (U9VL-FP) battery, and may present a tighter fit in a small number of devices with smaller battery compartments that were originally designed to match the dimensions and shape of an alkaline battery, which has more rounded edges. The U9VL-J is designed for applications in which the battery must either last a long time, such as in smoke alarms, or where it may be exposed to low temperatures or uncontrolled heat and humidity conditions, such as in electronic parking meters or other outdoor applications such as automatic watering systems and dog training transmitters.

Note for Wireless Mic Users

When to choose metal casing over plastic casing when selecting a 9 volt lithium battery? The metal casing is excellent for outdoor applications and high moisture situations. Smoke alarms can use either version.

The metal casing 9 volt lithium battery is not suitable for wireless microphone use due to the size of the battery casing. Battery cavity fit will be problematic. Choose the plastic version of Ultralife 9 Volt for wireless mics.

Medic Batteries are experts on 9 volt lithium batteries.  Choose Medic Batteries for your 9 volt lithium battery needs.

9 Volt Batteries – Important Tips On 9 Volt Batteries

• All 9 volt batteries are NOT exactly the same size
• A tiny difference in 9 volt batteries size will make a BIG difference in performance
• Rechargeable 9 volt batteries lose their charge faster than alkaline 9V batteries
• Most rechargeable 9 volt batteries cannot be recharged until they are completely drained
• Ultralife Lithium 9 volt batteries outlast all other 9 volt batteries. Ultralife 9 volt batteries are outstanding for smoke alarms, baby monitors, carbon monoxide alarms, garage door openers, security systems, clock radios and many other 9 volt applications.
• Lithium Ultralife 9V batteries are excellent for extreme temperature applications as they operate in varying temp ranges from -20 degrees to +140 degrees F, much better than 9 volt Alkaline batteries.
• Duracell, Energizer and Ultralife 9V batteries are the safest, most reliable 9V battery options

The dependability of 9 volt batteries relies more on the 9 volt batteries distributor than most people realize because while most 9 volt batteries look the same on the outside, only a reputable company can guarantee the quality of the 9 volt batteries on the inside.  Choose a merchant who offers a 100% guarantee on its 9 volt batteries.  Make sure the 9 volt batteries you buy have been properly stored in a cool, dry warehouse. Look for fresh 9 volt batteries with an expiration date of at least 4 years.

We recommend choosing Medic Batteries for all your 9 volt batteries shopping. Prices are low, service is exceptional and every battery is 100% guaranteed. Medic’s 9 volt batteries ship same day, and special discounts and free shipping promotions are frequently available at Medicbatteries.com.