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Lipo Safety: A Safety Guide for Using Lithium Polymer Battery Chargers

Lipo Safety: A Safety Guide for Using Lithium Polymer Battery Chargers

When it comes to lithium cell technology, the lithium polymer (LiPo or Li-poly) and the lithium ion (Li-ion) are significantly different from the commonly-used NiMH and NiCd batteries. There are various aspects to consider before you use lithium cells.

One of the most being safety. While every type of cell should be treated with caution due to energy contained in the batteries, once they are fully charged it is important to know that lithium cells contain the maximum in energy density. These batteries have unique qualities and require extremely specialized safety considerations.

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Charging Lithium Polymer Batteries

The lithium cells have to be charged in a very different way than the NiMh and NiCad batteries. These batteries require specialized chargers that are designed in a specific way in order to charge lithium polymer cells. One of the recommended chargers would be the TAHMAZO T26 charger; this is the type of charger that can be used on all cell types and is able to charge up to 10 LiPo cells. This charger features 10 battery memories, which makes it far easier to utilize.

Typically any type of charger that is able to charge the lithium ion will be able to charge the lithium polymer, making sure that the batteries in question have the correct cell count. It is extremely important to note that a NiMh or NiCad-only battery charger is never used to charge the lithium cells because charging the cells is dangerous when using the lithium batteries.

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Manufacturers and experts all recommend extreme caution when charging these cell types.[1] One of the first steps in preparing the charger for lithium cells is to make sure the charger has been set to the right cell count or voltage. If this step is missed the battery could potentially burst into violent flames. To date there have been numerous fires that have been caused directly from lithium batteries. For this reason it is now a standard practice that anyone wishing to use lithium polymer batteries should be aware of how to charge the cells and the safety precautions involved.

Below are the guidelines for charging and using lithium polymer batteries:[2]

  • Only use the chargers that have been approved for use with lithium batteries. These chargers should be designed for use on Li-Ion and Li-Poly.
  • The correct cell-count must be set on the charger. If the user is not informed on how to perform this operation it is advisable to rather use a charger that you do know how to operate or not charge the batteries at all.
  • Make sure to balance charge your new lithium battery for the next couple of cycles. After that you can do it every 10th cycle. This is vital due to the risk of a pack that has become unbalanced, thus having the potential to explode. If each of the cells is showing a reading that they are not within at least 0.1 volt to one another, the user needs to charge each of the cells separately up to 4.2 volts, which means they will all be equal. If after the period of each discharge the lithium pack shows up unbalanced, one of the cells are more than likely faulty and the entire pack will need to be replaced. (Of course, some lithium packs are different and will require a different amount of volts for recharging.)
  • The batteries and the charger need to be placed onto surfaces that are safe before charging the batteries, which means that if they do catch on fire damages can be contained. Some of the suggestions include fireplaces, Pyrex dishes that are filled with sand or a vented fire safe.
  • The batteries should never be charged for more than an hour at a time. Exceeding this time significantly increases the chances of a fire.
  • If one of the cells happens to balloon while on charge, the cell should not be punctured while still hot. This will cause a short circuit resulting in overheating. After you have let the cell sit in a fire safe place for at least 2 hours. Discharge the cell/pack slowly by wiring a flashlight bulb of appropriate voltage (higher voltage is ok, lower voltage is no) up to your batteries connector type and attaching the bulb to the battery. Wait until the light is completely off, then throw the battery away. This is an important step to do so the cell is safe enough to throw away.
  • The batteries should only be charged in ventilated and open areas. (In the case of a battery rupturing or exploding they will emit dangerous material and fumes.)
  • When charging lithium batteries, keep a bucket of sand nearby. This is a cost effective way to extinguish fires. It is very cheap and absolutely necessary.

(Also make sure to check out this battery disposal guide for information regarding instructions and regulations about battery disposal.)

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Final Thoughts

When it comes to handling lithium polymer batteries with care it is important for any user to realize that these batteries can be extremely dangerous. It is very important to follow these safety tips and ensure that the right charger is used.

Featured photo credit: Hexcam via dronetraining.co.uk

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Reference

[1]Battery University: Lithium-ion Safety Concerns
[2]Sydney Radio Control Society: October 2006 Newsletter

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Last Updated on August 29, 2018

5 Killer Online Journal Tools That Make Journaling Easier and More Fun

5 Killer Online Journal Tools That Make Journaling Easier and More Fun

Journaling is one of the most useful personal development tools around. Not only does it help us process emotions and experiences, work through internal conflicts and improve our self-awareness, it also provides us with a way to keep a day-to-day record of our lives. Traditionally an activity limited to pen and paper, the expansion of consumer technology has enabled journaling to go digital.

Saving your journaling entries online enables you to access them from anywhere, without having to carry a notebook and pen around, and provides you with digital features, like tagging and search functions.

Here are a list of five online journaling tools you can use to bring your practice into the modern age:

1. 750words

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750 words

    750words is a free online journaling tool created by Buster Benson. The site is based on the idea of “Morning Pages”; a journaling tool Julia Cameron suggests in her creativity course The Artist’s Way. Cameron advises aspiring creatives to start each morning with three pages of stream-of-consciousness writing to clear away the mental clutter, leaving you with a clearer mind to face the day.

    750 words is the three-page digital equivalent (assuming the average person writes 250 words per page) and lets you store all your journaling online. Each morning, you’ll receive a prompt asking you to write your 750 words, and the site keeps track of various statistics associated with your entries. The site uses a Regressive Imagery Dictionary to calculate the emotional content from your posts and provides feedback on features like your mood, and most commonly used words.

    750 words is simple to set up and is ideal for anyone who finds it challenging to maintain a consistent journaling practice. The site uses a number of incentives to motivate users, including animal badges awarded to journalers who complete a certain number of days in a row, leader boards, and opt-in monthly challenges.

    2. Ohlife

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    ohlife

      Ohlife is designed to make online journaling as easy as possible. Once you’ve signed up for your free account, the website will send you an email each day asking “How did your day go?” Simply reply to the email with as much or as little detail as you like, and your response will be stored on your account, ready to view next time you log in.

      Ohlife’s appeal lies in its simplicity: no stats, no social sharing, no complicated organisational systems—the site is designed to provide you with a private, online space. Simply respond to the email each day (or skip the days you’re busy) and Ohlife will do the rest.

      3. Oneword

      oneword

        OneWord is a fun online tool that provides you with a single word as a prompt and gives you sixty seconds to write about it. The concept’s aim is to help writers learn how to flow, and the prompts range from the everyday mundane to the profound.

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        Oneword is not a private journaling tool: if you sign up, your answers will be published on the site’s daily blog, which contains a stream of users’ answers, and might be used by Oneword in the future. If you’d rather keep your answers to yourself, you can still use the tool for fun without giving out any personal details.

        4. Penzu

          Penzu is a journaling tool that allows you to store your journaling notes online. The service also offers mobile apps for iOS, Android and Blackberry, so you can journal on the go and save your notes to your account. The basic service is free, however you can upgrade to Penzu Pro and get access to additional features, including military-grade encryption and the ability to save and sync data through your mobile, for $19 per year.

          With either version of Penzu, you can insert pictures, and add tags and comments to entries, as well as search for older entries. You can set your posts to be private and viewable by you only, or share them with others.

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          5. Evernote

          Evernote isn’t a purpose-built journaling tool, however its features make it perfect for keeping your journaling notes in one safe place. With the ability to keep separate “notebooks”, tag your entries, include pictures, audio and web clipping, Evernote will appeal to journalers who want to include more formats than just text in their entries.

          Available online within a web browser, and as a stand-alone desktop app, the service also comes with a series of mobile apps covering almost every device available. These allow you to make notes on the go and sync between the mobile and browser versions of the app.

          For additional features, including text recognition and the ability to collaborate on Notebooks, you can upgrade to Evernote’s premium service, which costs $5 per month.

          Featured photo credit: Unsplash via unsplash.com

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