This is the ProTek R/C 1S 550mAh, 25C Micro Helicopter Lithium Polymer battery pack. This pack is a direct fit for the Blade 120SR helicopter and will provide better performance and longer flight times!
- Type: Lithium Polymer
- Capacity: 550 mAh
- Voltage: 3.7V nominal
- Connector Type: JST
- Number of Cells: 1
- Weight: 15g
- Dimensions: 7.5x19x60mm
- Maximum Charge Rate: 1C (550mAh)
- Maximum Continuous Discharge: 25C (13.75A)
1) DO NOT leave the battery in your model when charging
2) DO NOT leave unattended when charging
3) ALWAYS balance charge the battery
4) ALWAYS use a LiPo charging bag
5) YOU MUST use a Li-Poly specific charger to charge the pack (NiMH or NiCD only chargers WILL NOT WORK!)
6) YOU MUST not over discharge the Li-Poly battery pack
7) READ & UNDERSTAND the instructions carefully before operating this battery
NOTE: When using high energy Li-Polymer Batteries, please do not over-discharge or over-charge batteries as this will result in over heated batteries. Discharging capacity can't exceed 80% of the max capacity of the pack after full charging to ensure a good cycle performance. It is recommended to fully charge a brand new battery before using and only discharge the battery 50% for first 5 cycles. Always monitor flight time and/or set a low voltage warning on ESC (End voltage cannot be lower than 3.2v per cell) Do not use the battery that has too low a voltage.
Do not expose batteries to sunshine or store/charge batteries at the temperature above 35°C or in a closed car. The high temperature environment could cause damage to the pack or make it burst. If the battery becomes hot while fast charging, high current discharging or racing, do not charge the battery until it has cooled completely. Wait about 20 mins, then inspect prior to recharging.
ProTek R/C is an AMain Sports & Hobbies brand.
This product was added to our catalog on February 21, 2011
Never charge at more than 1c or .5 amp
Never drop these batteries, all these small lipo's are fragile
Never take the batteries down below 3.75V open circuit voltage
Never leave the batteries fully charged for more than a day
Always store batteries at 3.82V-3.86V
One more thing, I know a lot of people are not going to like this but, I only fly my blade 120 sr for 4.5 minutes. When I land and check the battery voltage it reads 3.77V-3.78V, so that's about as low as I take my batteries. So if you want to fly longer get more batteries, I have 8. I know a lot of people fly their's for 6 minutes but trust me they are damaging their batteries. I hope this review helps some of you out their who are having battery issues with this otherwise awesome helicopter. Thanks
The run times for these packs compared to the E-flights is a LOT better !!
The only problem I've had is that the end caps will pull off if you're not carefull !
Make sure the connections inside the cap are ok then a very small dab of hot glue and you're back in business !!
Other than that these are great packs for your 120 SR !
I'd love to see Protek come out with a pack with even more capacity but I know weight would be a problem.
flying for 5 min till lv cut off then waiting an hr to charge, you forget what you were doing:( getting 3 batts run them half dead, they charge much quicker, and gives you the stick time, to have the ah ha! moment , i thought id never learn, first round of 3 batteries, i got the hang of flying around:) , i could not get past hovering with one batt good luck!
running in helimax brushless conversion mcp x