# Please note that whatever the balence charger it is, The open circuit voltage for each cell (Charging voltage/cell) must not higher than 4.235 volt/cell or safely 4.23 Volt/cell. Beyond that it may explode during charging. In Balance charger, the diverter circuit (Parallel Path with cell through Transistor) must limit this voltage below 4.2.
# The balance charger use Diverter technology So, you are requested to put off the charger during the cell open condition. Otherwise, power wastage will occur continuously.
# Though pouch cell are not packed in hard container, you are requested to sandwitch with two piece of Balsa and tighten with HDPE Fiber tape or meta wire. That will increase the cell life by preventing expansion in thickness.
# Dont discharge the cell beyond 3V/cell. Otherwise, it may not charge and loss capacity. Else, for better flight-time, Use higher capacity. Whenever experience major unbalance in cell pack (10% or more in terms of state of charge after using balanced charger) just isolate the cell from cell pack and replace with an newer cell.
# The manufacturing cost of Li-Poly is less that Li-ion cells. Only the R&D overhead is there and the cost is drastically reducing. Cell phones are now-a days cones with Li-Poly and also with protection circuit modules. Though protection circuit modules increase weight a little bit, but peace of mind with high charging & Discharging current. (900mAH cell <Rs200/-). If course you can dispose off the plastic packaging.
# You can safely charge at 10C for a 20C cell and can go without problem up to 15C. But don't exceed that for safety reason. But you can safely use the discharge rate. (Generally we use throttle about 25-50% and discharge rate far below rated used. 30C means Total discharge in 2 minutes only).
# For use of NiMH cells in Transmitter, use low self discharge cells. The capacity may be low but it can give benefit to you.
Brand name of LSD cells are given below.
* Prolife from Fujicell
* Ready2Use Accu from Varta
* AccuEvolution from AccuPower
* Hybrid from Rayovac
* eneloop from Sanyo
* eniTime from Yuasa
* Infinium from Panasonic
* ReCyko from Gold Peak
* Instant from Vapex
* Hybrio from Uniross
* Cycle Energy from Sony
* MaxE and MaxE Plus from Ansmann
* EnergyOn from NexCell
* ActiveCharge/StayCharged/Pre-Charged/Accu from Duracell
* Pre-Charged from Kodak
* nx-ready from ENIX energies
* Imedion from Maha
* Pleomax E-Lock from Samsung
===============================From a site having data for 1C battery (2005?)=====
Typical Charge Graph (Cell Capacity: 850mAh)
CC/CV Charge at 4.2V, 1C +25ºC
Cheapest Charger
Typical Discharge Graph
CC/CV Charge at 4.2V, 0.5C, +25ºC. CC Discharge to 3.0V, +25ºC.
Cheapest Charger
Typical Discharge Graph
CC/CV Charge at 4.2V, 0.5C, +25ºC. CC Discharge at 0.5C to 3.0V.
Cheapest Charger
Typical Cycle Graph
CC/CV Charge at 4.2V,1C, +25ºC. CC Discharge at 1C to 3.0V, +25ºC.
Cheapest Charger
PrecautionsTo prevent a possibility of the battery from leaking, heating or explosion please observe the following precautions:
Warning !
* Do not immerse the battery in water or other liquid.
* Do not use or leave the battery near a heat source such as fire or heater.
* Do not use the battery to power any other device.
* When recharging, only use specified battery charger.
* Do not reverse the positive (+) and negative (-) terminals.
* Do not connect the battery to an electrical outlet.
* Do not discard the battery in fire or expose it to a flame.
* Do not short-circuit the battery by directly connecting the positive (+) and negative (-) terminal with metal objects.
* Do not transport or store the battery together with metal objects.
* Do not strike, throw, drop or damage the battery
* Do not try to pierce, disassemble or modify the battery.
* Do not use the battery in a corrosive environment.
* Do not directly solder to the battery.
* Do not put the battery into a microwave oven
Caution ! # Always read the manufacturers manual for the device before operating, trying to charge, install or remove the battery.
# Store batteries out of reach of children.
# Do not use or leave the battery at very high temperature (for example, at strong direct sunlight or in a vehicle in extremely hot weather). Otherwise, it can overheat, catch fire or its performance will be degenerate and its service life will be decreased.
# Do not use it in a location where static electricity is great, otherwise, the safety devices may be damaged, causing hidden trouble of safety.
# If the battery leaks, and the electrolyte get into the eyes. Do not rub eyes, instead, rinse the eyes with clean running water, and immediately seek medical attention. Otherwise, it may injure eyes or cause a loss of sight.
# If the battery does not charge properly or it is not lasting very long, stop using it and replace it with a new one.
# If the battery gives off an odor, generates heat, becomes discolored or deformed, or in any way appear abnormal during use, recharging or storage, immediately remove it from the device or battery charger and stop using it.
# In case the battery terminals are dirt, clean the terminals with a dry cloth before use. Otherwise power failure or charge failure may occur due to the poor connection with the instrument.
# Be aware discarded batteries may cause fire, tape the battery terminals to insulate them. Recycle batteries where possible and abide by local disposal guidelines and directives.
# Do not leave the battery in a discharged state, always recharge it after use, otherwise it could lead to loss of performace or in more sereve causes make the battery useless.
# If the battery is not in use for an extended period of time remove it from the device and store it in a cool, dry, clean environment. When storing for extended periods charge the battery to 50% and recharge it at the intervals stated above under Storage.
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