Nothing kills your morning faster than a Sequoia key fob that won’t Discover the door. You need a CR2016 lithium coin battery that actually fits the smart key slot and delivers reliable voltage. I tested five contenders to find the best CR2016 lithium coin battery for a Sequoia smart key replacement.
Every battery here had to meet three simple standards. First, it must be a genuine CR2016 3V lithium cell, not a knockoff. Second, the brand needed solid customer feedback — at least 100 ratings unless it was brand-new stock. Third, I only picked packs of two so you have a spare ready.
Quick Comparison: best CR2016 Lithium Coin Battery for a Sequoia smart key replacement
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | Key Battery Outlet CR2016 Editor’s Pick |
Toyota smart key owners | 2-Pack | Check Price → |
| 2 | Deluxe Batteries CR2016 Best Value Runner-Up |
Traditional key fobs | 2-Pack | Check Price → |
| 3 | Battery Guru CR2016 Amazon’s Choice |
Budget-friendly 2-pack | 2-Pack | Check Price → |
| 4 | Duracell CR2016 Trusted Brand |
Name-brand reliability | 2-Pack | Check Price → |
| 5 | Energizer CR2016 Child-Safe Design |
Households with kids | 2-Pack | Check Price → |
How I Selected These Products
I started by filtering for genuine CR2016 3V lithium cells only. No off-brand chemistry or sketchy voltage claims. Every battery here had to match the exact specs your Sequoia smart key requires to function properly.
Value mattered more than just the lowest price. I looked at how many batteries you get per pack and whether the brand has a track record of consistent performance. A cheap battery that dies in three months isn’t a deal at any price.
User feedback shaped the final ranking heavily. I cross-referenced star ratings with actual written reviews from people who used these in Toyota smart keys. Batteries with widespread complaints about fitment or early failure got cut immediately.
Best Overall
Key Battery Outlet CR2016 Key Fob Battery for Toyota (2 Pack) – Replacement for Toyota Camry
CR2016 2 Pack | 4.6 Stars | 254 Ratings | Amazon’s Choice | 500+ Bought/Month
- KEY FOB BATTERY INSTALLATION: This kit includes [qty 2] CR2016 batteries...
- OEM-QUALITY CR2016 BATTERIES: Includes premium CR2016 batteries identical...
This is the battery I’d grab first for my own Sequoia. Key Battery Outlet specifically lists the Sequoia in its fitment guide alongside the HYQ12BBY and HYQ12BDC smart key models, so you know it’s not a guessing game. With a 4.6 rating from 254 buyers and Amazon’s Choice badge, it’s got the crowd confidence to back it up.
This pack is best for anyone who wants a drop-in replacement with zero compatibility headaches. The only catch is that it’s priced a bit higher than generic store-brand options, but the fitment guarantee makes that worthwhile for Toyota owners.
✅ Pros
- Exact fit for Sequoia smart keys including HYQ12BBY and HYQ12BDC models
- Amazon’s Choice with 500+ units bought monthly shows consistent demand
- 2-pack gives you a spare for the next time the fob dies
❌ Cons
- Price per battery is higher than generic no-name alternatives
- Only works with smart key fobs, not traditional flip-out key models
Best for Traditional Keys
Deluxe Batteries CR2016 Key Fob Replacement Batteries for Toyota Traditional Key (Camry Corolla RAV4 Tacoma 4Runner Highlander Tundra Yaris Venza Prius c Avalon) Remote Head (Pack of 2)
CR2016 2 Pack | 4.6 Stars | 159 Ratings | 400+ Bought/Month
- CONFIRM FIT **Please confirm compatibility using the fitment guide located...
- Compatible only with Toyota traditional key heads in which the key is...
Deluxe Batteries covers a ton of Toyota models including the Sequoia, but it focuses on traditional key fobs rather than the smart key style. I like that it specifically calls out the remote head design, which is a different shape than the smart key slot. The 4.6 rating from 159 people tells me it delivers consistent voltage.
This is your best bet if you have an older Sequoia with a flip-out key and separate remote head. The limitation here is that it’s not designed for the newer push-to-start smart key fobs, so double-check your key type before ordering.
✅ Pros
- Covers 12 different Toyota models in the fitment guide
- 400+ units bought monthly indicates strong repeat purchases
- Free returns if the battery doesn’t match your key style
❌ Cons
- Not compatible with push-to-start smart key fobs
- Fewer total ratings than the top pick, so less long-term data
Amazon’s Choice
Battery Guru CR2016 3V Car Key Battery (Pack of 2)
CR2016 3V 2 Pack | 4.8 Stars | 28 Ratings | Amazon’s Choice | 400+ Bought/Month
- Recommended battery replacement for a low or dead car key fob battery...
- This battery is compatible with several types of car remotes. Please refer...
Battery Guru is a newer player with only 28 ratings, but it’s already earned Amazon’s Choice status and 400+ monthly sales. The 4.8 star average is the highest in this lineup, which tells me early buyers are happy. I appreciate that they offer multiple CR-series sizes if you need a different battery for another device.
This is ideal if you want the highest-rated option and don’t mind a brand without years of track record. The honest limitation is the small sample size — 28 ratings isn’t enough to guarantee long-term consistency like the established brands have.
✅ Pros
- Highest star rating in the list at 4.8 out of 5
- Amazon’s Choice badge with 400+ monthly purchases
- Also available in CR1616 and CR1632 sizes for other devices
❌ Cons
- Only 28 ratings available, so long-term reliability is unproven
- No specific Toyota fitment guide like the top two picks offer
Trusted Brand
Duracell 2016 3V Lithium Coin Batteries 2 Count (Pack of 1)
CR2016 2 Pack | 4.6 Stars | 27,502 Ratings | Amazon’s Choice | 8K+ Bought/Month
- COMPATIBLE DEVICES: Powers car key fobs, remote controls, medical devices...
- CHILD SAFETY FEATURES: Duracell CR2016 features child safety design to help...
Duracell is the name everyone recognizes, and with 27,502 ratings and 8,000+ units sold monthly, this is the most popular CR2016 on the market. I trust Duracell for consistent voltage output, which matters when your Sequoia fob needs reliable power to Discover the doors every time.
This is the safe bet if you want a brand you’ve used in TV remotes and toys for decades. The downside is that Duracell doesn’t include a Toyota-specific fitment guide, so you’ll need to verify your fob takes a CR2016 before buying.
✅ Pros
- 27,502 ratings make it the most reviewed CR2016 battery available
- 8,000+ units sold monthly shows massive consumer trust
- Duracell’s lithium chemistry is proven for long shelf life
❌ Cons
- No Toyota-specific fitment guide included in the packaging
- Generic packaging doesn’t confirm compatibility with smart key fobs
Child-Safe Design
Energizer 2016 Batteries (2 Pack)
CR2016 2 Pack | 4.7 Stars | 8,741 Ratings | 7K+ Bought/Month
- 3V LITHIUM Coin Lithium Batteries: One 2 pack of Energizer 3V Lithium Coin...
- 3-IN-1 CHILD SHIELD: Featuring 3-in-1 Child Shield with three lines of...
Energizer’s CR2016 comes with a 3-in-1 Child Shield coating that makes it harder for kids to swallow these tiny coin cells. I think that’s a huge deal if you’ve got little ones crawling around the house. With 8,741 ratings and a 4.7 average, it’s nearly as proven as Duracell but with an extra safety layer.
This is the battery to buy if safety is your top concern or if you’re storing spares within reach of children. The trade-off is that the bitter coating can leave a slight residue on your fingers when handling the battery during installation.
✅ Pros
- 3-in-1 Child Shield coating adds safety against accidental ingestion
- 8,741 ratings with a 4.7 average star rating
- 7,000+ units sold monthly proves widespread trust
❌ Cons
- Bitter safety coating can leave a mild residue on fingers during installation
- No Toyota-specific fitment guide to confirm Sequoia compatibility
What to Look for in CR2016 Lithium Coin Battery for a Sequoia smart key replacement
Picking the wrong CR2016 for your Sequoia smart key is a common headache. I’ve seen people buy the right voltage but the wrong physical size, or grab a battery that doesn’t hold a charge for more than a few weeks. The biggest mistake is assuming all coin cells are the same — they’re not, and your fob will let you know fast.
Voltage and Chemistry
Every CR2016 is a 3-volt lithium manganese dioxide cell. That’s non-negotiable for your Sequoia smart key — anything less and the fob won’t transmit a signal strong enough to reach the car. Stick with lithium chemistry only. Alkaline or silver oxide coin cells may fit but won’t deliver the consistent 3V your key needs to Discover the doors every time.
Physical Dimensions and Fitment
A CR2016 measures 20mm in diameter and 1.6mm thick. That “16” in the name tells you the thickness in tenths of a millimeter. I’ve seen people accidentally buy a CR2025 (2.5mm thick) that won’t close properly in the fob. Always check that the battery compartment lid sits flush after installation, or the contacts won’t make solid connection.
Brand Reputation and Quality Control
Not all CR2016 batteries are manufactured to the same standard. Big-name brands like Duracell and Energizer have decades of quality control data behind their production lines. Newer brands can be just as good, but they haven’t proven their consistency across millions of units. I look for at least a few hundred ratings before I trust a new brand with my key fob.
Shelf Life and Storage
Lithium coin cells lose about 1-2% of their charge per year when stored at room temperature. That means a battery manufactured two years ago still has roughly 96% of its original capacity. I always check that the batteries come in sealed blister packs rather than loose in a bag, because moisture exposure accelerates self-discharge significantly.
Pack Size and Value
Most CR2016 batteries come in packs of two, which makes sense because key fob batteries tend to die at similar intervals. A two-pack gives you a spare for the next time your Sequoia fob starts acting sluggish. Buying singles is rarely worth it unless you only need one battery and don’t want to store a spare for years.
Safety Features
Coin cell batteries are a serious choking hazard for children and pets. Some manufacturers add a bitter coating or child-resistant packaging to reduce the risk. If you have kids at home, I’d prioritize batteries with safety coatings even if they cost a little more. The peace of mind is worth the small premium.
My Shortcut Advice: Buy a two-pack from a brand that specifically lists your Sequoia model in its fitment guide. That one step eliminates 90% of the compatibility problems I see people complain about in reviews.
Frequently Asked Questions
What’s the best CR2016 battery for a Sequoia smart key replacement?
I recommend the Key Battery Outlet CR2016 Key Fob Battery for Toyota because it specifically lists the Sequoia in its fitment guide alongside the HYQ12BBY and HYQ12BDC smart key models. It has a 4.6 rating from 254 buyers and carries the Amazon’s Choice badge. That fitment guarantee alone saves you the headache of buying a battery that doesn’t seat properly in the fob.
How do I know if my Sequoia key fob uses a CR2016 battery?
Open the key fob and look at the battery compartment — the battery type is usually printed on the battery itself or stamped into the plastic housing. If your Sequoia is a 2008 or newer model with a push-to-start smart key, it almost certainly uses a CR2016. The older flip-key models with a separate remote head also use CR2016 in most cases.
Can I use a CR2025 instead of a CR2016 in my Sequoia fob?
Technically it will fit in the diameter, but the CR2025 is 2.5mm thick compared to the CR2016’s 1.6mm. That extra thickness prevents the fob from closing properly, which means the battery contacts won’t make solid contact. I’ve seen people force it and crack the fob housing — stick with the CR2016.
How long should a CR2016 battery last in a Sequoia smart key?
Most CR2016 batteries last between 12 and 18 months in normal daily use. If you park far from your house and use the remote start feature frequently, you might get closer to 10 months. The lithium chemistry holds steady voltage until it’s nearly dead, so you’ll usually notice the range decreasing before the battery dies completely.
Is the Duracell CR2016 better than the Energizer CR2016 for key fobs?
Both are excellent choices with nearly identical specs. The Duracell has 27,502 ratings and 8,000+ monthly sales, making it the most popular option. The Energizer has 8,741 ratings and a slightly higher 4.7 star average, plus the Child Shield coating for safety. I’d pick Duracell for pure volume of proven reliability and Energizer if you have kids at home.
Why does my new CR2016 battery not work in my Sequoia fob?
First check that you removed the protective plastic tab from the positive side of the battery — that’s the most common mistake I see. If the tab is off and it still doesn’t work, clean the metal contacts inside the fob with a dry cloth. Sometimes a thin layer of oxidation prevents the circuit from completing even with a fresh battery.
Can a dead CR2016 battery damage my Sequoia key fob?
No, a dead CR2016 won’t damage the fob itself. Lithium coin cells don’t leak like alkaline batteries do, so you won’t get corrosion inside the compartment. The bigger risk is waiting too long to replace it and getting stranded somewhere with a car that won’t start because the fob can’t communicate.
How should I store spare CR2016 batteries for my Sequoia key?
Keep them in the original sealed blister pack at room temperature — avoid hot cars and humid bathrooms. Lithium coin cells lose about 1-2% of their charge per year in proper storage, so a battery you buy today will still be good when your current one dies in a year. Just don’t store them loose in a drawer where the terminals can short against metal objects.
My Final Verdict
After testing all five, the Key Battery Outlet CR2016 Key Fob Battery for Toyota is my clear winner for your Sequoia smart key replacement. It’s the only battery on this list that specifically lists the Sequoia with HYQ12BBY and HYQ12BDC models in its fitment guide, and its 4.6 rating from 254 buyers proves it works. For the runner-up, the Deluxe Batteries CR2016 is your best bet if you have an older traditional key fob. And if budget is everything, the Battery Guru CR2016 offers a 4.8 star average that beats everyone on paper.
If you’re still on the fence, here’s my simple rule: buy the Key Battery Outlet pack if you want guaranteed fitment for your smart key. Grab the Duracell or Energizer if you’d rather stick with a household name you already trust. Either way, get a two-pack so you have a spare ready for next year.
Winner: Key Battery Outlet CR2016
- KEY FOB BATTERY INSTALLATION: This kit includes [qty 2] CR2016 batteries...
- OEM-QUALITY CR2016 BATTERIES: Includes premium CR2016 batteries identical...
Buy this if you want a guaranteed fit for your Sequoia smart key with zero guesswork. It’s the only battery here with a Toyota-specific fitment guide that covers your exact fob model.
Runner-Up: Deluxe Batteries CR2016
- CONFIRM FIT **Please confirm compatibility using the fitment guide located...
- Compatible only with Toyota traditional key heads in which the key is...
Pick this if you drive an older Sequoia with a traditional flip-out key and separate remote head. It covers 12 Toyota models and has 400+ monthly sales backing its reliability.
Budget Pick: Battery Guru CR2016
- Recommended battery replacement for a low or dead car key fob battery...
- This battery is compatible with several types of car remotes. Please refer...
Grab this if you want the highest star rating in the lineup at 4.8 and don’t mind a newer brand. It’s already earned Amazon’s Choice with 400+ monthly sales.