OPUS BT-C2400 Battery Charger Analyzer Tester for AA AAA NiMH NiCd rechargeable batteries

Tiene la función para descargar a 0% es muy útil para una carga full y las pilas que duraban con poca carga, parece ser que las repara

The product manual is a bit daunting, but well written. Once the features are understood, I found that pressing buttons was a good way to find out how to select the modes and achieve the desired result. The LCD display is illuminated and clear, showing the progress of the selected operation. Robust product.

** Received September 28, 2015 from Amazon Fulfillment with 2.2 firmware. ** This charger is awesome. It operates more similarly to LaCrosse chargers than the Maha C9000. I have two rechargeable battery intensive hobbies... one is small scale RC Car racing, and the other is photography. I'm constantly charging batteries for one of the two things and as of receiving this one I now own three smart chargers: This one, the Maha C9000, and the Maha C801D. The C801D is a very basic smart charger in comparison and I primarily use it when I need to charge several batteries at once rather than when I want to try to condition and restore a cell so this will mainly be a review in comparison to the C9000. The tl;dr version is, both the Maha C9000 and this Opus BT-C2400 have their strong points and for people that have a need to charge a lot of batteries, I can recommend both for different situations. Get this one if you'll ever be using older batteries as it has a better chance of restoring them. Get the Maha C9000 if you don't use old batteries and have the need to charge cells quicker. ----- The main point I really like about that BT-C2400 charger is that it wont give up on your old batteries that have seen better days. The Maha C9000 does a check when you insert a battery and if it detects too much resistance, it displays "HIGH" and refuses to charge a cell. The BT-C2400 however will attempt to charge the cell to try to restore it (it states in the manual that it will probably charge at a reduced rate to what you select if it detects really high resistance). I was able to restore some power to some old cells that had sat around since 2010. Though the resistance is too high for them to be used for RC racing, they can be used for slower drain items like remotes / controllers / tablet pens. The main point for the Maha C9000 is the ability to charge on all 4 slots at up to 2000 mAh where you're limited to half of that with the Opus (70% of it if you're only charging two batteries on the outer slots). If you need to charge something faster and still want the monitoring functions of a smart charger, the C9000 is the better option. I also like the break in mode of the C9000 for a fresh pack of batteries. You can use the refresh function similarly with the Opus, but even though you have to push more buttons on the Maha I like the break in interface more for it. If you're going to be working with older cells and want to try to restore them to get some use out of them, I'd go for this one over the C9000. The cost is lower and it will service older batteries without a problem where the Maha C9000 might refuse them. If you'll be working with newer batteries mostly and value the higher charge rate, the Maha C9000 is still a tried and tested smart charger and works really well. The Opus BT-3400 is another option, but it does the same thing as this one except it supports other types of batteries. It's really only worth the extra money if you think you'll be using lithium rechargeables. My hobbies only involve NiMH so it wasn't worth the extra $20 to step up. The final alternative is the LaCrosse chargers. I used to own their BC-700 but it just died on me at random so I don't have the best impression of longevity for LaCrosse chargers. Currently, the BC-700 is overpriced for what it does. The Opus BT-C2400 does everything the BC-700 does and more... in fact it's more comparable to the higher end BC-1000 in charging speed while still winning on features and price. To it's credit though, the BC-1000 does come with a case, two sets of batteries, and adapters so that offsets the price difference. At this point, I don't think I could seriously recommend any of the LaCrosse BC-700 at all. The BT-C2400 is simply better and costs less to boot. The BC-1000 should only be an option if you need the adapters to C or D, or if you really really need the smaller footprint of the LaCrosse charger (you don't). So I can really only recommend the Opus or the Maha right now. If you have the money, both have their positive points and I'd get one of each. For everyone else though, unless the faster charging speed is really necessary for you, this is probably the most well rounded smart charger on the market. It's also refreshing to see that they are always updating hardware and firmware so I think they are likely to stand behind their product longer.

So far it's good,been using from past 15 day's.

Please note that this review was written by me, an actual person. If it seems a bit "too clean", it is because it has been run through Chat GPT simply for improving the style and grammar. After researching smart battery chargers, I initially leaned toward the much hyped Powerex (Maha) MH-C9000Pro. However, after comparing features and price, I ultimately chose the Opus BT-C2400, and I’m glad I did. It performs well and costs less than the Maha. What I Like * Comprehensive Functions: It offers all the essential features of a smart charger/analyzer—Charge, Discharge, Test Internal Resistance, and Discharge/Refresh. * Detailed Display: Shows voltage, capacity (mAh), charging current (mA), and cycle duration. * Thoughtful Design: The battery slots are well-spaced, which helps prevent overheating. * Built-in Safety: Includes a temperature sensor to avoid overheating during operation. * Simultaneous Slot Monitoring: You can view data for all four slots at once. In contrast, the Maha MH-C9000Pro cycles through each slot and stat, which would drive me crazy. * Great Value: Offers excellent functionality at a lower price point. What Could Be Better * Display Behavior: Once a battery is fully charged, the screen only shows "Full" in most modes. I wish it would alternate between "Full" and the selected stat (e.g., mAh, voltage, duration), as it does briefly in Charge/Test mode. You can press "Display" to view other stats, but they flash too quickly to capture or read easily. * LCD Quality: The screen is functional but a bit dated. It has limited viewing angles and reminds me of old digital watches where you had to tilt your wrist just right to read the display. * Inconsistent Resistance Readings: The internal resistance feature is a nice addition, but the readings vary widely and should be taken as rough estimates. Still, it’s a feature the Maha lacks entirely. * Lack of Charge/Discharge Rate Guidance: The manual doesn’t specify recommended charge or discharge rates for AA/AAA batteries during refresh cycles. I had to consult the Maha manual for guidance. Charge/Discharge Rates According to my research, it is recommended that charge mA rates should be no less than 30% of the battery's rated mAh capacity. For example, a 900mAh AAA battery should be charged at no less than 270mA (900 x 0.3 = 270). The reason is that, although low charging rate is generally good for the battery, it may prevent the charger from cutting off when charging is done, therefore potentially overcharging, overheating, and damaging the battery. Final Thoughts The Opus BT-C2400 is a solid smart charger with a robust feature set. It delivers excellent value and functionality. If you're looking for a capable charger without breaking the bank, this one is worth considering.