Lithium batteries have become a popular upgrade for RVs, solar homes, and off-grid electrical systems. Their light weight, high capacity, and long lifespan outperform lead acid batteries. But the upfront cost of lithium batteries can be daunting. Sales on quality brands like Deep Power make upgrading more affordable. If you see that Deep Power lithium batteries are on sale, it’s the perfect time to buy. But not all battery sales are equal. Here is what savvy shoppers should look for to get the best value from a Deep Power lithium battery deal.
Check the Battery Specs
Lithium battery capabilities vary widely by cell chemistry, capacity, max amps, depth of discharge, and more. When Deep Power batteries go on sale, first look at the key specifications:
- Capacity (Amp-hours) – More is better, with 100-200Ah typical for deep cycle uses.
- Voltage – 12V or 24V systems are most common. Voltage must match your application.
- Max Amps – 30+ amps support high surge loads from motors, pumps, inverters, etc.
- Cycle Life – 3000+ cycles indicate an extended lifespan.
- Weight – Lithium is typically 1/2 to 1/3 the weight of comparably sized lead acid batteries.
- Size – Dimensions must fit your battery compartment or mounting location.
- Terminal Type – Match required cable size and terminal connectors.
Checking specs ensures the battery will meet your particular power needs before purchasing.
Understand the Lithium Technology
Deep Power lithium batteries may utilize different underlying cell technologies:
- Lithium Iron Phosphate (LiFePO4) – Safest and most stable cathode material, but lower energy density. Preferred for RV, marine, and solar storage uses.
- Nickel Manganese Cobalt (NMC) – Cathodes boost energy density but can pose fire risks if improperly engineered. Common in electric vehicle and consumer device batteries.
- Lithium Titanate (LTO) – Unique anode material resists overheating and can charge ultra-fast. Used in high-power applications.
The cell technology influences performance traits like energy density, power, safety, lifespan, and cost. Lithium iron phosphate (LiFePO4) is generally the best fit for deep cycle applications the average DIY user encounters. When looking at a discounted Deep Power lithium battery, double check it uses the appropriate chemistry.
Ask About the Warranty
Before buying any lithium battery, especially at a discounted price, ensure it comes with a warranty that protects against early failure. Good Deep Power lithium battery warranties should offer:
- At least 2-3 years of comprehensive coverage
- Replacements for batteries that fail to hold a charge
- Coverage for defects in materials and manufacturing
- At least 80% capacity retention guaranteed for the warranty period
- Details on approved use cases, operating conditions, charging sources, etc.
- Clear return/replacement process if issues arise
Don’t assume discounted or open-box lithium batteries enjoy the same protections as new. And beware exaggerated warranty periods that sound too good to be true. Carefully read the warranty text before purchasing a discounted Deep Power battery.
Research the Seller Reputation
Deep Power makes quality lithium batteries, but disreputable sellers may dump old, used, or counterfeit stock at markdown prices. When you find cheap Deep Power batteries for sale:
- Check seller ratings – High ratings with lots of reviews indicate a legitimate business.
- Look for certification – Authorized Deep Power retailers should advertise this status.
- Call with questions – Judge responsiveness and how they handle technical battery questions.
- Review return policy – Good sellers honour returns for defective/incompatible batteries.
- Check point of origin – Most lithium batteries ship direct from China, but quality control varies.
Buying directly from Deep Power‘s website or authorized distributors and dealers ensures you get genuine, fresh batteries. Discount sellers on Amazon or eBay may raise red flags.
Consider a Battery Management System
A battery management system (BMS) is like an electronic brain that monitors and protects each cell in a lithium battery bank. Quality BMS features include:
- Overcharge/undercharge protection
- Short circuit and overcurrent prevention
- Cell balancing to optimize lifespan
- Temperature monitoring and cutoffs
- Automatic shutoff for issues
Deep Power’s integrated BMS offers these essential protections. But cheaper lithium batteries often lack adequate management systems. When buying discounted lithium batteries, consider pairing them with an aftermarket BMS for safety and performance. This avoids ruining an off-brand battery that lacks integrated monitoring.
Compare Prices Per Watt-Hour
Lithium battery capacity is measured in watt-hours (battery voltage x amp-hours). To compare apples to apples between different amp-hour batteries on sale, calculate:
Price per Watt-Hour = Battery Price / (Volts x Amp-Hours)
Lower cost per watt-hour indicates a better value. Two 100Ah batteries may have the same amp-hour rating. But the battery selling at a lower price per watt-hour will give you more bang for your buck. Remember to factor in any added costs like a separate BMS if required.
Crunch the Numbers on Operational Costs
The upfront purchase price isn’t the only cost factor. When choosing between lead acid and lithium batteries on sale, consider:
- Usable lifetime – Lithium lasts over 5 times longer than lead acid.
- Weight – Lithium weighs up to 75% less. This saves on fuel or transport costs.
- Efficiency – Lithium charges faster and provides more usable capacity.
- Maintenance – Lithium requires no acid checks or water refills.
While lithium batteries have a higher first cost, their longer usable lifespan, lower weight, and higher efficiency pay dividends over years of operation. Weigh the total operational costs when choosing between battery types.
Be Realistic About Your Needs
It’s tempting to buy the largest, heaviest duty lithium battery available when it’s on sale. But overkill comes at a cost. Carefully consider:
- Runtime needed between charges – Don’t buy more capacity than you can use.
- Max electrical loads – Size for realistic wattage, not hypothetical peaks.
- Physical size limitations – Measure your available space before purchasing.
- Weight constraints – A battery that’s too heavy becomes a liability.
Getting a great deal only counts if the battery fits your requirements. The best value comes from accurately matching battery capabilities to your needs.
Lithium battery sales provide the perfect opportunity to upgrade to longer lasting, more efficient power storage. But smart shopping is a must to maximize their value. Use these tips to capture the benefits of lithium over lead acid for RVs, boats, solar power, and off-grid living applications when Deep Power batteries go on sale.