Wistar® Laptop Battery – Compatible with Battery for Dell Latitude E5400, E5410, E5500, E5510 | P/N : KM742, KM668, | 6 Cell

Troubleshooting Methods:

Before you decide to purchase a new battery, follow these quick and easy troubleshooting steps to make sure you truly need a replacement:

• Remove the battery and try to install it multiple times to ensure the battery is properly placed.
• Could be due to conductive material damage to the laptop motherboard and battery anode and cathode contact position, you can try and check it with your original battery.
• Look whether the battery drive is in normal condition, if not, download the corresponding driver software to update.
• Take out the battery and press the power button for about 15 seconds to consume the internal residual power without connecting the power cord, and then reinstall the battery. Try this several times.

3 Ways to Replace your Laptop Battery

For Internal batteries:

• The first step to replacing the battery in your laptop is finding it.
• To do this, you’ll need to remove the cover on your laptop carefully and look through the various compartments inside.
• Remove the old battery by removing the screws in the bottom of your laptop.
• Now place the old battery on top of your new one so that they connect together properly and fit snugly into their sockets!
• Once you’ve removed the old battery, you should be able to install a new one without any problems.

For external batteries:

• Unplug or disconnect the power cable.
• Turn your laptop such that the bottom is facing upwards.
• Look for the battery latch of your laptop. (some of the latches are shown in the image)
• To remove the battery, slide the latch switch to the opposite side.
• The battery will either pop out on its own or you can just pull the battery out gently.

How to identify internal and external batteries ?

The internal battery is usually located underneath the laptop’s keyboard, while the external battery is usually located in the laptop’s power adapter.

To identify the internal battery, look for a small, rectangular battery pack underneath the keyboard. The internal battery is usually silver or black in color.

To identify the external battery, just turn your laptop and look for a battery latch. Slide the latch to the opposite side. The battery will either pop out on its own or you can just pull the battery out gently.

Steps to follow with your New Battery

• As soon as you receive your new battery, discharge the battery to 5% and not 0%, then charge to 95%, and continue the process 3-4 times with your new battery.
• The key here is to perform a full discharge and charge every other month to extend the battery life.
• Make sure you don’t connect the adapter for a longer duration while using it to avoid any possible damage to the battery.
• Avoid artificial shocks, disassembly, crush or puncture. Do not dispose of it in fire or water.

Are compatible batteries safe?

A compatible battery is the best option if the one which came along with your laptop is not working properly anymore. Compatible batteries are always an affordable and safe option for without a doubt and you can make them much safer by following a few precautions while using them. Compatible batteries are better than the original ones because they have an equal battery life just like the original ones. One of our suggestions for such a compatible battery is here.

 

Tips to extend your Battery Life

• Turn off Keyboard Backlights
• Lower the Laptop Brightness
• Shutdown Power-consuming Applications
• Turn On the Power Saver Mode
• Avoid Overheating

 

 

 

📦 Packaging & 🚚 Shipping – Green Lap® / Wistar®  Laptop Battery

We take great care to ensure your product arrives in perfect condition, securely packaged and quickly delivered

📦 Secure Packaging

• 🛡️ Anti-Static Protection – Each keyboard is sealed in an anti-static sleeve to prevent electrical discharge.

• 📦 Durable Box – Shipped in a sturdy cardboard box with inner cushioning to absorb shock and prevent transit damage.

• 🔒 Tamper-Evident Seals – Ensures authenticity and safety, giving you peace of mind.

🚚 Shipping Information

• ⏱️ Fast Dispatch – Orders shipped within 24–48 hours after confirmation.

• 📆 Delivery Timeline
  • Standard Delivery: 3–7 business days
  • Express Delivery: 1–3 business days (at checkout)

• 🔍 Tracking Support – You’ll receive a tracking number once dispatched.

• 🚛 Trusted Couriers – Delivered via reliable services like Delhivery, Blue Dart, DTDC, India Post, and more.

🌍 Serviceable Locations – Green Lap®

We proudly deliver across all major regions in India, covering most serviceable PIN codes through trusted courier partners.

📌 Coverage Details

• 🇮🇳 Pan-India Shipping – Available to metros, tier-1, tier-2 & rural locations.

• 🌐 International Orders – For global shipping, kindly contact our support team via WhatsApp or email.

⚠️ Important Reminder

• 🏠 Double-check your shipping address before placing your order.

• 💻 Confirm laptop model compatibility to avoid return or replacement delays.

✅ Green Lap® is committed to fast, reliable delivery anywhere in India.

💡 Why Choose Green Lap – Fresh Energy® Battery?

With a strong focus on performance, compatibility, and durability, Green Lap® / Wistar® laptop batteries offer a reliable, cost-effective replacement for your laptop.

Each battery is:

✅ Function-Tested – Ensures optimal charging, discharging, and safety standards
🔧 Fit-Tested – Accurate shape, connector pin type & screw positions for hassle-free fit
💰 Value-Optimized – High performance at the best price in its class

⚠️ Note: Please confirm the voltage, capacity, pin type, and model compatibility before purchase.

🤝 B2B Ordering Support – Bulk & Business Deals

We welcome partnerships with:

🏫 Educational Institutions
🛠️ Laptop Repair Shops
🏢 Corporate IT Departments
🔁 Electronics Resellers / Distributors

 

💼 Why Partner with Green Lap®?

📉 Bulk Pricing – Competitive discounts for large orders
🔁 Flexible MOQ – Minimum Order Quantity as per your business scale
👤 Dedicated Account Manager – For smooth coordination and support
🚚 Priority Dispatch – Fast-track fulfilment for registered B2B partners

 

📝 How to Place a Bulk Order

📧 Email or 📞 call our B2B sales team
🧾 Share your quantity, laptop models & preferred delivery timelines
💬 Get a custom quote with flexible payment options
✅ Confirm & receive on-time delivery updates

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📞 Get in Touch

📧 Email: rajlaptopcare.online@gmail.com
🕘 Business Hours: Monday – Friday | 9 AM – 6 PM IST