SAFE Recharging of Exotic Batteries, NiMH, LiPO and Complex Battery Packs or Multiple Cells.

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Introduction: SAFE Recharging of Exotic Batteries, NiMH, LiPO and Complex Battery Packs or Multiple Cells.

About: So what ideas would you like to try?
DO NOT use normal NiCd or Nickle Metal Hydride Battery chargers

Some exotic cells in sizes of 14500 (AA), D and specialized 3.7 to 12v LiPO packs are cheap and easy to obtain but the battery CHARGERS are often difficult to find or VERY expensive. These types of packs and bundled cells are also VERY sensitive to charging rates, temp and current! OR they Explode.



PCB's and special chargers can be had or built from scratch. However free or cheap voltage converters available off the shelf, workbench power supplies are DANGEROUS!

This instruction will show rechargeable battery types, several sizes with codes and nomenclature along with their compatibility with conventional sizes.

Use these in Lights, small toys & Appliances and RC planes and Cars.

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Step 1: Exotics - Recharging

Recharging is dangerous take proper precautions:

STEPS:

-never recharge unattended batteries

-charge outside or on fireproof surface (marble/tile/cement)

-Use approve charges that monitor
*Temp
*current draw
*voltage
*time

-never use unrated or unknown batteries

-never use more or less cells than charger was designed for!

1) Test cells with Multimeter or rated battery tester, in a pinch use a small LED or lightbulb like a flashlight.

2) Dead cells with ZERO voltage are usually b ad and are to be discarded.

3) THREE or FOUR major battery types are in use
Alakline - these are 'Disposable' like Eveready voltage 1.5v
NiCD/NiMH - 'Re-chargables' reusables usually 1.2v
Zinc Air - One time use when exposed to air, 1.5 to 3v+
Lithium - Polymer packs as below or for 'high drain' devices

4) Specialized rechargers are required for Rechargeable Lithium Polymer packs, these monitor voltages, temp or charge rates. Do not use NiCD or NiMH chargers with lithium packs!

5) Specialized LiPO cells are available in 18650 and 14500 sizes. These can be used in some AA or C cell and larger devices with adaptors.

See my other instructables....

Final notes:

Test positive and negitive poles/tabs with a multimeter. Some "protected" cells have small PCB to control charge/discharge rates and have no "button" tops.

Step 2: Charging!

Some Examples of cells:


Be sure to match charger with cells, current and heat/monitoring PCB's

Reminder: some LiPo cells have 'built-in' charge monitoring PCB's and temp/current cutouts!

The Lt Blue cell below is a AA sized (14500) 3.7v protected Lithium Polymer cell. Great for regulated lights and high power LED or HID bulbs! The Red is a LONG size AA for specialized packs.

Rechargable cells in NiMH for 1/2D size 1.2v can be combined for higher voltages in smaller spaces.

See my flashligh post on instructables.


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Step 3: TIPS

Use magnets for connections to button cells.

Charge multiple cells only in rated chargers and in series if charger is rated for multiple voltages.

Lithium cells are EXPLOSIVE if charged in a NiCd or NiMH charger!

Video


Step 4: Custom Work

Some "custom" battery packs...



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    28 Discussions

    0
    lilpepsikraker

    They aren't LiPo batteries. They are Li Ion. However, smaller capacities that are 99% safe is called LiFePO4.

    0
    lilpepsikraker
    lilpepsikraker

    Reply 11 years ago on Introduction

    I meant the AA and AAA sized batteries. They are 14500=AA, 10440=AAA, 18650 lion is for torches, 16340 is CR123 rcr, etc

    0
    matse9999
    matse9999

    11 years ago on Introduction

    hi ercgillis, want to ask something, I bought a battery pack for my psp and i wanted to add one or two more battery in parallel with the battery inside the battery pack to increase the mAh of the battery pack. is it safe?? or do i need to modify also the circuit? the battery is LiPo.. thanks!!!

    0
    Coffee bean
    Coffee bean

    Reply 11 years ago on Introduction

    u sure mine are lith ion, also check out some the AA charger packs for the psp, i think they would serve better

    0
    dlfynrdr
    dlfynrdr

    12 years ago on Introduction

    My neighbor heard I was building my own battery pack for my bicycle's lighting system and needed a charger. He gave me the old charger to his kid's power wheel. It's 12 volt, but will it recharge a NIMH based pack? I think those power wheels use a lead cell or something like that. Here's a picture of the charger.

    0002708426105_500X500.jpg
    0
    erckgillis
    erckgillis

    Reply 12 years ago on Introduction

    only use it IF it is specifically rated for NmHy and at the voltage & current max for your pack. The charger fine print will show ... From pic I can see 12v is your bike lite 12

    0
    dlfynrdr
    dlfynrdr

    Reply 12 years ago on Introduction

    Yes. As a matter of fact, I'm rebuilding the pack using 10 NiMh sice C in series. I built it originally with an old rechargable drill pack I had laying around, but now is the time to upgrade I believe. I just need to make sure I have a charger ready for when I do.

    0
    Bongmaster
    Bongmaster

    12 years ago on Introduction

    Hey i got that solar pack :D its good if u got the sun for it :3

    0
    hmms
    hmms

    12 years ago on Introduction

    nice collection of batteries there!!

    0
    erckgillis
    erckgillis

    Reply 12 years ago on Introduction

    Ugh ...more taxes and we start up Social Security deductions again till $69k

    0
    erckgillis
    erckgillis

    Reply 12 years ago on Introduction

    Old enough to Bag Groceries or Mow lawns, Clean Pools, Babysit.... Get a job! lol

    0
    !Andrew_Modder!
    !Andrew_Modder!

    Reply 12 years ago on Introduction

    lol. im gona in summer, try to get a job at my local golf driving range.

    0
    !Andrew_Modder!
    !Andrew_Modder!

    Reply 12 years ago on Introduction

    EXACTLY! :-D. i love hitting the cart things xD, lol just got to get there asap when they open for summer.

    0
    Ohm
    Ohm

    12 years ago on Introduction

    Uh one thing, where are the instructions? Also LiPo's are dangerous, you can get proper chargers for about 20 dollars and a good charger is definitely worth the money, the one I have only cost 45 and it works beautifully.