Content of the material
- Reader Success Stories
- 9. Clean your jeans in the freezer
- How to Protect and Keep Your Batteries Functioning in Cold Temperatures
- Some tips to prolong your batteries
- Avoid charging all the way to 100%
- Avoid deep discharges
- Monitor your battery’s temperature
- Specific tips for specific device battery
- Is It Dangerous to Keep Batteries in the Refrigerator?
- 7. How to seal freezer bags
- Frequently Asked Questions (FAQs):
- Does Putting Dead Phone Batteries In The Freezer Revive The Batteries?
- Choosing a Freezer/Fridge for battery power
- Check the energy use
- Why that wont work!
- The extreme temperature will reduce the battery’s performance
- Batteries are supposed to die, eventually
- Related Posts:
Reader Success Stories
H. O. Nov 13, 2017
“This article is not all that helpful. It is, at most, an almost worthless stop-gap process. Save yourself some time and get a new battery on eBay.” …” more
9. Clean your jeans in the freezer
Wow, this is certainly a new one for us!
If you want to make sure your jeans are clean, but don’t want to ruin their texture or colour, your freezer could be the answer.
Place your folded jeans inside a clean plastic bag, and pop on a clean shelf in your freezer. The sub-zero temperature will kill germs and make them much fresher.
How to Protect and Keep Your Batteries Functioning in Cold Temperatures
If you anticipate needing to use your batteries in cold temperatures, that is another situation. One thing is for certain: lithium batteries work WAY better in cold temperatures than lead-acid.
However, even lithium batteries perform best when above freezing temperatures. In fact, our internal BMS has a charging cut-off that prevents the battery from charging and damaging itself at these low temperatures.
By keeping your batteries warm in colder temperatures you can avoid charging difficulties. This can be accomplished by using an external heating pad or by keeping your lithium batteries in an insulated or heated compartment. (Reminder: lead-acid batteries cannot be installed in a non-vented compartment, but our lithium batteries can!)
However, to make the process even easier, we’ve installed heat-enablers in our lithium batteries. The technology incorporates an internal heating system, allowing for charging and discharging in colder climates and expanding the temperature restrictions for the Battery Management System (BMS). The heating element is easy to use and can be enabled and disabled with a switch to prevent accidental usage. They are also very easily prepared for long-term storage.
Learn more about our Heated Batteries in the video below!
Some tips to prolong your batteries
If you don’t want to replace your lithium-ion battery too quickly, there are specific ways to prolong its life and delay the time of replacement:
Avoid charging all the way to 100%
It might seem efficient to charge the battery to 100% before you disconnect it. However, the reality is quite the opposite. Instead, it would be best to reduce the float voltage to increase the battery’s overall service life and cycle life. Of course, doing this will reduce the battery capacity, but it will increase the overall life of your battery up to five times!
Avoid deep discharges
Do not go below 2 to 2.5 Volts because deep discharges permanently and very quickly damage lithium-ion batteries. It can cause a short circuit inside the battery, making it unsafe and unusable. Many lithium-ion batteries usually have protective circuitry inside the battery packs. They open the connection if the voltage goes any lower than 2.5 volts or over 4.3 volts. So even if the current goes higher than a preset threshold when discharging or charging, the lithium-ion battery is protected.
Monitor your battery’s temperature
A battery’s temperature plays an essential role in its overall life. If it reaches the extremes, there is a higher chance that your battery will give up on you sooner than expected. When the heat exceeds the threshold, the battery becomes unsafe and unstable to use. It promotes plating, which leads to internal short circuits. Hence, prohibit battery temperatures from going below zero degrees Celsius.
Specific tips for specific device battery
If you are concerned about your specific device battery, check these infographics out for more details:
Is It Dangerous to Keep Batteries in the Refrigerator?
In terms of safety concerns, there is no risk in keeping batteries in the freezer.
However, one should not install them after taking them out of the refrigerator right away.
Also, you need to ensure proper packaging material before putting them in the freezer.
Otherwise, wet conditions can leak the alkaline batteries and expose potassium hydroxide after the outer shell gets corroded.
7. How to seal freezer bags
Resealable freezer bags are great. Second best are freezer clips. Don’t have either?
When we run out, we use binder clips. These are strong enough to keep even the fullest of packaged goods sealed.
TOP TIP: Bought a bag of frozen chicken breasts, battered cod or burgers? The packaging takes up so much unnecessary room in your freezer. Before freezing, take the items out from the packet and rebag them up in the portions required. You’ll save so much space.
Frequently Asked Questions (FAQs):
Do Batteries Last Longer In The Freezer? If I say yes, I will be telling you the half-truth. It requires some explanation that I have given above. But I don’t recommend you do it. Can You Put Batteries In The Freezer To Recharge Them? No, you can’t recharge a battery just by putting them in the freezer. In cold temperatures, the rate of self-discharge gets decreases dramatically. So, it actually helps to maintain the existing charged level. Can You Put Lithium Batteries In The Freezer? Yes, it is possible and safe to put lithium batteries in the freezer as there is no water content in them. However, you should leave them at room temperature for some time before recharging and using them. Can You Put Dead Batteries In The Freezer? I have already told you that putting batteries in the freezer is not ideal. And, putting dead batteries doesn’t do any good to them; there are no additional benefits. Can You Put Rechargeable Batteries In The Freezer? The discussion I have done above is true for all types of batteries. Freezing rechargeable batteries can help retain the charge it has but there are hardly any more benefits to such actions.
Does Putting Dead Phone Batteries In The Freezer Revive The Batteries?
Dead batteries should not be placed in the trash right away. There are ways to revive a dead battery. You can still restore the cells in two different ways or method. Find which one will suit you best.
Method 1: Freezing the batteries
1. Remove the battery from the phone. 2. Place the battery in a sealed plastic before placing it inside a plastic container. Avoid using paper bags or foils because water can easily sip in. 3. Place the sealed battery inside your freezer. Leave it on your freezer overnight or at least 12 straight hours. 4. Remove the battery from the freezer. Let it warm down to room temperature. Avoid using the battery while it is frozen. 5. Remove moisture from the battery. 6. Return the array in your gadget but don’t turn it on yet. Charge your phone using its charger. Allow the battery at least 48 hours of charging time. 7. After loading your phone for at least 48 hours, you have to check the battery power level. You will notice that it can hold its charge again.
Method 2: Jumpstarting the batteries
1. Ready everything you will need in jumpstarting your cells. For this, you will need a : ● 9V battery ● Electrical tape ● Electrical wire (You may choose the red and black wire). 2. Connect the positive and negative terminal of your phone battery to the electrical wires. You can quickly determine these through the + and – signs. Phone terminals usually have more than one battery terminals. Better use the ones that are far from each other. Never used the central terminals. 3. Use electrical tape to cover the connections. Be careful with the contacts so as not to interchange it. 4. Connect the wire of the positive terminal to the positive terminal of your phone. Do the same thing with the negative end. 5. Secure the connections by using electrical tape. Store it at cold temperature and away from water and heat. 6. Let it sit for about a minute or until the battery gets a little warmer. Make sure to monitor the charging time and be on the lookout every time. 7. Disconnect when you feel that the battery is already warm to touch. 8. Place back the battery in your phone and check if it powers on. 9. See the battery level when you put it on. When the charge is not yet done, put it back and wait until the battery becomes fully charged.
Choosing a Freezer/Fridge for battery power
Any fridge or freezer can be powered from batteries. In principle, you can choose a fridge or freezer for off-grid use just as you would for a grid-connected home: based on the capacity, form factor, and special functionality (auto-defrost, icemaker, etc.).
But: energy saving models make sense off-grid. To save you batteries and sparse off-grid energy (e.g. solar), it worthwhile to add energy-efficiency high on the priority list – much more so than in a grid-connected home.
A motivation: Compared to a wasteful side-by-side, an energy-efficient bottom-freezer fridge may save you $1000 or 350 lb. worth of battery capacity*.*Assumed: 250 vs. 500 kWh/a, 3d autonomy, $1.50/Ah, 0.6lb/Ah AGM batteries
Check the energy use
Specifically, you want a cooling appliance with a low yearly energy use in kilowatt-hours (kWh). Look for the kWh number on the yellow Energy Guide (US), the Energuide (CA), Energy Label (EU and UK), or Energy rating label (AU).
As of 2021, an energy use around 200 kWh/a is the lowest you will find for any fridge or freezer – the best small-to-medium chest freezers and small refrigerators with no freezer or a top/bottom freezer may get this low.
At the other extreme, the most power-hungry units are at around 800 kWh/a; these are invariably large side-by-side or French-door refrigerator-freezers.
For a more fine-grained breakdown of energy use by freezer or fridge type and size, check the third part of this series.
Why that wont work!
Now that we have established where this myth came from and how it originated, let’s talk about why it is a big fat lie!
The extreme temperature will reduce the battery’s performance
As much as people think that putting a lithium-ion battery in a freezer or at lower temperatures will make it work better, in reality, the opposite happens. When you place a battery in the refrigerator, the liquid inside usually freezes. Hence, it breaks all electrical connections there and also bends the plates badly. As a result, the battery’s output is significantly lowered, and if frozen enough, the battery becomes useless.
Batteries are supposed to die, eventually
As much as it may hurt your sentiments, your batteries are not immortal! They are supposed to die down with time after they have served their purpose. As they age, their output decreases, and they have to be replaced at some time or the other. Hence, no matter how many DIYs you try, you cannot revive a dead battery once it has lived its life. And I know it hurts, but you need to move on!
In this article we learned what you need running your freezer or fridge on battery power. We also got a rough idea of the inverter power and battery capacity you are going to need.
But if you want to optimize the inverter and battery power system, you should definitely check the other two parts of the series:
Part 2 will look deeper into inverter sizing. There I tell you how the commonly quoted power rules are wrong and give you formulas for better estimating the required inverter power.
Part 3 focuses on batteries, analyzing freezer and fridge power draw in detail and providing more accurate battery pack sizing rules.
- Freezers & Fridges on Batteries: Inverter Sizing
- Freezers & Fridges on Batteries: Battery Pack Sizing