Lithium Battery Charger Circuits
Battery Chargers:  Alkaline       Lead Acid        Lithium      Nickel

Lithium Battery Chargers:  #'s - K        L - M        N - Z

Last Updated: November 30, 2017 07:38 AM

8-Solar Cell Lithium Ion Battery Charger Version 2 -  Jim Wilber looked at my design for a battery charger and sent me some suggested changes.  He suggested using the LTC4412 ideal diode IC to switch off the current path from the solar cell to the battery in darkness.  He also noted that the 2.5v regulator from Seiko I had selected was no longer in production and suggested using the shunt reference… . . . Circuit by David Johnson P.E., 5/21/13

A Fast Charger for NiMH
& NiCad Batteries -  This is a truly versatile charger.  It can charge up to 15 identical NiMH
or NiCad cells.  You can build it to suit any size cells or cell capacity and you can set the charge rate.  It can fast charge, trickle charge and has safeguards, including temperature sensing, to prevent overcharging.__ SiliconChip

A Minature Low Dropout Battery Charger for Lithium-Ion Batteries -  DN239 Design Notes __ Linear Technology/Analog Devices

A Very Low Cost SOT-23 Li-ION Battery Charger Requires Little Area & FeW Components -  DN250 Design Notes __ Linear Technology/Analog Devices

Add Charging Status to Simple Circuit Lithium-Ion Charger -  2-Oct-08 EDN-Design Ideas By adding a few simple components to a single-cell Li-ion charger IC, you can get LEDs that indicate charging and charge completed __ Circuit Design by Peter T Miller, Applied Inspirations, Bethlehem, CT

Advanced Topology USB Battery Charger Optimizes Power Utilization for Faster Charging -  Design Notes 336: The LTC4055 seamlessly manages power flow between an AC adapter, USB cable and Li-Ion battery, all while maintaining USB power specification compliance. __ Linear Technology/Analog Devices

Battery (NiCad) Rejuvenator -  Don't throw away those seemingly un-chargeable, rechargeable batteries; they could very well be brought back to life with the aid of this simple circuit.    (Tony van Roon's Tony van Roon) __ Designed by Tony van Roon  VA3AVR

Battery Amp-hour Capacity Tester -  I bought some lithium ion rechargeable batteries a while back.  I was planning on using them to modify some solar powered LED spot lights.  What I like about these new batteries is that they are the same size as a standard 1.5v alkaline AA cell. . . Circuit by David Johnson P.E.-February, 2012

Battery Extends Power over Ethernet Poe Peak Current -  DN361 Design Notes__ Linear Technology/Analog Devices

Battery Rejuivnator for Lithium Batteries -  These batteries are Not Rechargable.  But you can get Considerable Extra Life in this way __ Designed by G.L. Chemelec

Build a USB Powered AA NiMH
& NiCd Battery Charger -  I’m always complaining about all the chargers and wall warts I need to carry with me when going on a trip.  This project, which can charge a pair of AA Nickel Metal Hydride   (NiMH
) or Nickel Cadmium   (NiCd) cells using a laptop’s USB port for power, arose to address part of that problem. __ Contact: Stefan Vorketter

Charge Li Ion Batteries from AC Line Voltage -  03/02/98 EDN-Design Ideas NOTE :  File contains many circuits, please scroll to find this one.   Li-ion battery chargers must apply constant current when the battery charge is low and constant voltage when the battery charge is high.  To avoid battery damage, the tolerance on the applied voltage must be less than 1%.  The charger in Figure 1 complies with these requirements. __ Circuit Design by Matt Schindler, Maxim Integrated Products, Sunnyvale, CA

Dual Smart Battery Charger Simplifies Battery Backup for Servers -  DN342 Design Notes__ Linear Technology/Analog Devices

Eight-Solar Cell Lithium Ion Battery Charger Version 3 -  A single lithium ion battery cell needs 4.2v from a current source to insure it is fully charged.  A solar panel with just enough individual cells wired in series to produce the needed voltage would be more efficient than one with more cells for a given surface area.  If you divide 4.2 by eight you come up with a figure of 0.525 volts. . . Circuit by Dave Johnson P.E.-May, 2013

Fast Charger for NiMH
& NiCad Batteries -  This is a truly versatile charger.  It can charge up to 15 identical NiMH
or NiCad cells.  You can build it to suit any size cells or cell capacity and you can set the charge rate.  It can fast charge, trickle charge and has safeguards, including temperature sensing, to prevent overcharging.__ SiliconChip

Fast Universal Battery Charger: Part 2 -  Second article has all the constuction details.  This unit will solve all your charging problems once and for all.__ SiliconChip

Fast Universal Power Charger -  It chargers NiCad, NiMH
, lithium-ion and SLA batteries as well as a conventional car and bike lead-acid batteries.  Build it and solve all your charging problems in one hit.__ SiliconChip

Friendly Charger for Mobile Phones -  Most mobile chargers do not have current/voltage regulation or short-circuit protection.  These chargers provide raw 6-12V DC for charging the battery pack.  Most of the mobile phone battery packs have a __ Electronics Projects for You

Inexpensive Charges Lithium-Ion Cells -  DN188 Design Notes__ Linear Technology/Analog Devices

Intelligent Lithium/NiMH
Battery Charger -  this will top-up your motorbike battery in 2-3 hours and switch off __ Contact: P. Townshend EduTek Ltd

iPOD Charger 1 -  MP3 Player Charger|