--- product_id: 316513149 title: "Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries" brand: "energizer" price: "HK$234" currency: HKD in_stock: true reviews_count: 8 category: "Energizer" url: https://www.desertcart.hk/products/316513149-ultimate-lithium-9v-batteries-1-pack-lithium-9-volt-batteries store_origin: HK region: Hong Kong --- # 20% longer life vs MAX 10-year shelf life Works -40°F to 140°F Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries **Brand:** energizer **Price:** HK$234 **Availability:** ✅ In Stock ## Summary > 🔋 Energize your essentials with unstoppable power and peace of mind! ## Quick Answers - **What is this?** Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries by energizer - **How much does it cost?** HK$234 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/316513149-ultimate-lithium-9v-batteries-1-pack-lithium-9-volt-batteries) ## Best For - energizer enthusiasts ## Why This Product - Trusted energizer brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power That Outlasts:** Up to 20% longer runtime in toys vs standard alkaline—stay ahead in play and performance. - • **Extreme Weather Ready:** Reliable operation from -40°F to 140°F—your devices never miss a beat, no matter the season. - • **Versatile & Dependable:** Ideal for smoke detectors, toys, clocks, and remote controls—power your essentials with confidence. - • **Leak-Resistant Durability:** Engineered to prevent leaks, protecting your valuable devices and ensuring safety. - • **Lightweight & Long-Lasting:** 25% lighter than alkaline batteries with up to 10 years of stored power—ready when you are. ## Overview Energizer Ultimate Lithium 9V Battery delivers up to 20% longer life in toys compared to standard alkaline batteries, operates reliably in extreme temperatures from -40°F to 140°F, and features leak-resistant construction. Lightweight and capable of holding power for up to 10 years in storage, this battery is perfect for smoke detectors, toys, clocks, and other essential devices. ## Description Nothing outlasts Energizer Ultimate Lithium 9V Batteries. These Energizer batteries last up to 20 percent longer in toys versus Energizer MAX batteries, and they feature leak resistant construction and performance in extreme temperatures ranging from -40 F to 140 F. Use these 9 volt lithium batteries to power toys and games, or use them to provide up to 10 year battery backup in AC powered smoke detectors. Energizer 9 volt Ultimate Lithium batteries weigh 25 percent less than standard alkaline batteries. They also hold power for up to 10 years in storage, letting you keep a ready supply of backup 9 volt batteries. To ensure your favorite devices operate at their peak performance, depend on Energizer lithium batteries for work, play and home. Review: Good price - Light battery, good price, review say holds charge really well. Review: Watch out for old stock... - I bought this for a smoke detector (backup power) - picking this based specifically on it's claimed long shelf life.... only to get one (in Dec 2025) that had a date of manufacture in 2023... ## Features - 1 pack of Energizer Ultimate Lithium 9V Batteries - Lasts up to 20 percent longer in toys versus Energizer MAX batteries - Performance in extreme temperatures from -40 F to 140 F ensures reliable use in all seasons - Long lasting batteries have leak-resistant construction - Lightweight 9 volt batteries last up to 10 years in storage - Ideal battery for toys and clocks, and long lasting smoke detector battery ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B018N7YZL6 | | Amperage | 1 Amps | | Antenna Location | Radio | | Battery Capacity | 9 Volts | | Battery Cell Type | Lithium Metal | | Battery Weight | 250 Grams | | Battery capacity | 9 Volts | | Battery cell composition | Lithium Metal | | Best Sellers Rank | 8,474 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 738 in Disposable Household Batteries | | Box Contents | Battery Pack | | Brand | Energizer | | Brand Name | Energizer | | Compatible Phone Models | smoke detectors, remote control cars, toys, games | | Country of Origin | United Kingdom | | Customer Reviews | 4.7 out of 5 stars 2,330 Reviews | | Global Trade Identification Number | 00039800911568 | | Item Dimensions | 32 x 13 x 19 millimetres | | Item Type Name | 9v-batteries | | Item Weight | 0.08 Pounds | | Manufacturer | Energizer | | Model Name | ENR L522BP.H4 LITH 9V-1 EMOD | | Model Number | L522BP | | Number of Batteries | 1 AAA batteries required. (included) | | Number of batteries | 1 AAA batteries required. (included) | | Recommended uses for product | Radio | | Reusability | Single Use | | UPC | 039800911568 | | Unit Count | 1.0 count | | Unit count | 1.0 count | | Voltage | 9 Volts | ## Product Details - **Battery capacity:** 9 Volts - **Battery cell composition:** Lithium Metal - **Brand:** Energizer - **Number of batteries:** 1 AAA batteries required. (included) - **Recommended uses for product:** Radio ## Images ![Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Image 1](https://m.media-amazon.com/images/I/71oul0XReoL.jpg) ![Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Image 2](https://m.media-amazon.com/images/I/71CMWI+0scL.jpg) ![Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Image 3](https://m.media-amazon.com/images/I/71hvtOCihLL.jpg) ![Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Image 4](https://m.media-amazon.com/images/I/81KJtob2BTL.jpg) ![Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Image 5](https://m.media-amazon.com/images/I/71k2ILrboiL.jpg) ## Questions & Answers **Q: what is the mah?** A: According to a vendor, it is 750 mAh capacity; I use them for smoke alarms (hardwired installed) and haven't replaced one yet. Generally standard 9v batteries would die after a power outage, ive replaced them all with lithium no problems in since. **Q: are these l522bp-2 the same as advance lithium l522 ?** A: Nope, different. "9V Ultimate lithium" are Energizer's current product. Energizer '9V Advanced lithium' has been discontinued so I'd bet that those are old stock. Be sure to check the expiration date. BP-2 just indicates there are two batteries in each individual package. No designation, A plain BP, or Bp-1 would indicate a single battery per package. BP4 would be a 4 pack, etc. **Q: Life span in smoke alarms?** A: Lasted only 1 year 5 months in my smoke detector. **Q: Is there any chance of these batteries used in a smoke detector exploding and causing a fire?** A: Virtually none. This type of battery constuction is by far the most stable of all common types. These are much safer and more stable than NiMH such as rechargeables or "standard" batteries which are generally Alkaline. I use these in any sensitive devices or devices not used often but important. As such I use these in my own smoke detectors and have never had any issue. For what it is worth I've been a FireFighter for 25+ years, so yes they are safe. The one thing to be aware of is that if your smoke detector is hard wired and requires a rechargeable battery as a backup power source then do not use these. These are not rechargeable batteries. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good price *by A***R on 23 March 2026* Light battery, good price, review say holds charge really well. ### ⭐⭐⭐ Watch out for old stock... *by J***D on 9 January 2026* I bought this for a smoke detector (backup power) - picking this based specifically on it's claimed long shelf life.... only to get one (in Dec 2025) that had a date of manufacture in 2023... ### ⭐⭐⭐⭐⭐ A+ *by D***N on 6 February 2023* A+ ## Frequently Bought Together - Energizer Ultimate Lithium 9V Batteries (1 Pack), Lithium 9 Volt Batteries - Energizer Ultimate Lithium AA Batteries Pack, 1.5V AA Batteries, 24 Count - Energizer AA Batteries, Ultimate Lithium Double A Battery, 8 Count --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/316513149-ultimate-lithium-9v-batteries-1-pack-lithium-9-volt-batteries](https://www.desertcart.hk/products/316513149-ultimate-lithium-9v-batteries-1-pack-lithium-9-volt-batteries) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-07-06*